docs: Add comprehensive documentation navigation guide to CLAUDE.md

Added "Documentation Navigation" section with:
- Clear explanation of docs/ folder structure and purpose of each subdirectory
- Guidelines for finding existing documentation before implementing features
- Practical rules for when to create ADRs, design docs, reports, or standards
- File naming conventions for different document types

This improves agent and developer ability to navigate the documentation
system and maintain proper organization standards.

Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.gitea/workflows/build-container.yml

@@ -0,0 +1,58 @@
+# Gitea Actions workflow for StarPunk
+# Builds and pushes container images on version tags
+
+name: Build Container
+
+on:
+  # Trigger on version tags
+  push:
+    tags:
+      - 'v[0-9]+.[0-9]+.[0-9]+'
+  # Allow manual trigger from Gitea UI
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: docker
+    steps:
+      - name: Install dependencies
+        run: |
+          if command -v apk > /dev/null; then
+            apk add --no-cache nodejs npm docker git
+          elif command -v apt-get > /dev/null; then
+            apt-get update && apt-get install -y nodejs npm docker.io git
+          elif command -v yum > /dev/null; then
+            yum install -y nodejs npm docker git
+          fi
+
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Extract registry URL
+        id: registry
+        run: |
+          # Extract hostname from server URL (remove protocol)
+          REGISTRY_URL=$(echo "${{ github.server_url }}" | sed 's|https://||' | sed 's|http://||')
+          echo "url=${REGISTRY_URL}" >> $GITHUB_OUTPUT
+
+      - name: Login to Gitea Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ steps.registry.outputs.url }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ./Containerfile
+          push: true
+          tags: |
+            ${{ steps.registry.outputs.url }}/${{ github.repository }}:${{ github.ref_name }}
+            ${{ steps.registry.outputs.url }}/${{ github.repository }}:latest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

CHANGELOG.md

@@ -7,6 +7,36 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.9.5] - 2025-11-23
+
+### Fixed
+- **SECRET_KEY empty string handling**: Fixed config.py to properly handle empty `FLASK_SECRET_KEY` environment variable
+  - `os.getenv()` returns empty string (not None) when env var is set to `""`
+  - Empty string now correctly falls back to SESSION_SECRET
+  - Prevents Flask session/flash failures when FLASK_SECRET_KEY="" in .env file
+
+## [0.9.4] - 2025-11-22
+
+### Fixed
+- **IndieAuth authentication endpoint correction**: Changed code redemption from token endpoint to authorization endpoint
+  - Per IndieAuth spec: authentication-only flows use `/authorize`, not `/token`
+  - StarPunk only needs identity verification, not access tokens
+  - Removed unnecessary `grant_type` parameter (only needed for token endpoint)
+  - Updated debug logging to reflect "code verification" terminology
+  - Fixes authentication with IndieLogin.com and spec-compliant providers
+
+### Changed
+- Code redemption now POSTs to `/authorize` endpoint instead of `/token`
+- Log messages updated from "token exchange" to "code verification"
+
+## [0.9.3] - 2025-11-22
+
+### Fixed
+- **IndieAuth token exchange missing grant_type**: Added required `grant_type=authorization_code` parameter to token exchange request
+  - OAuth 2.0 spec requires this parameter for authorization code flow
+  - Some IndieAuth providers reject token exchange without this parameter
+  - Fixes authentication failures with spec-compliant IndieAuth providers
+
 ## [0.9.2] - 2025-11-22
 
 ### Fixed
@@ -127,7 +157,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - **v0.8.0**: Correct implementation based on official IndieLogin.com API documentation.
 
 ### Related Documentation
-- ADR-019: IndieAuth Correct Implementation Based on IndieLogin.com API
+- ADR-025: IndieAuth Correct Implementation Based on IndieLogin.com API
 - Design Document: docs/designs/indieauth-pkce-authentication.md
 - ADR-016: Superseded (h-app client discovery not required)
 - ADR-017: Superseded (OAuth metadata not required)

CLAUDE.MD

@@ -1,412 +0,0 @@
-# StarPunk - Minimal IndieWeb CMS
-
-## Project Overview
-
-StarPunk is a minimalist, single-user CMS for publishing IndieWeb-compatible notes with RSS syndication. It emphasizes simplicity, elegance, and standards compliance.
-
-**Core Philosophy**: Every line of code must justify its existence. When in doubt, leave it out.
-
-## V1 Scope
-
-### Must Have
-- Publish notes (https://indieweb.org/note)
-- IndieAuth authentication (https://indieauth.spec.indieweb.org)
-- Micropub server endpoint (https://micropub.spec.indieweb.org)
-- RSS feed generation
-- API-first architecture
-- Markdown support
-- Self-hostable deployment
-
-### Won't Have (V1)
-- Webmentions
-- POSSE (beyond RSS)
-- Multiple users
-- Comments
-- Analytics
-- Themes/customization
-- Media uploads
-- Other post types (articles, photos, replies)
-
-## System Architecture
-
-### Core Components
-
-1. **Data Layer**
-   - Notes storage (content, HTML rendering, timestamps, slugs)
-   - Authentication tokens for IndieAuth sessions
-   - Simple schema with minimal relationships
-   - Persistence with backup capability
-
-2. **API Layer**
-   - RESTful endpoints for note management
-   - Micropub endpoint for external clients
-   - IndieAuth implementation
-   - RSS feed generation
-   - JSON responses for all APIs
-
-3. **Web Interface**
-   - Minimal public interface displaying notes
-   - Admin interface for creating/managing notes
-   - Single elegant theme
-   - Proper microformats markup (h-entry, h-card)
-   - No client-side complexity
-
-### Data Model
-
-```
-Notes:
-- id: unique identifier
-- content: raw markdown text
-- content_html: rendered HTML
-- slug: URL-friendly identifier
-- published: boolean flag
-- created_at: timestamp
-- updated_at: timestamp
-
-Tokens:
-- token: unique token string
-- me: user identity URL
-- client_id: micropub client identifier
-- scope: permission scope
-- created_at: timestamp
-- expires_at: optional expiration
-```
-
-### URL Structure
-
-```
-/                           # Homepage with recent notes
-/note/{slug}               # Individual note permalink
-/admin                     # Admin dashboard
-/admin/new                 # Create new note
-/api/micropub              # Micropub endpoint
-/api/notes                 # Notes CRUD API
-/api/auth                  # IndieAuth endpoints
-/feed.xml                  # RSS feed
-/.well-known/oauth-authorization-server  # IndieAuth metadata
-```
-
-## Implementation Requirements
-
-### Phase 1: Foundation
-
-**Data Storage**
-- Implement note storage with CRUD operations
-- Support markdown content with HTML rendering
-- Generate unique slugs for URLs
-- Track creation and update timestamps
-
-**Configuration**
-- Site URL (required for absolute URLs)
-- Site title and author information
-- IndieAuth endpoint configuration
-- Environment-based configuration
-
-### Phase 2: Core APIs
-
-**Notes API**
-- GET /api/notes - List published notes
-- POST /api/notes - Create new note (authenticated)
-- GET /api/notes/{id} - Get single note
-- PUT /api/notes/{id} - Update note (authenticated)
-- DELETE /api/notes/{id} - Delete note (authenticated)
-
-**RSS Feed**
-- Generate valid RSS 2.0 feed
-- Include all published notes
-- Proper date formatting (RFC-822)
-- CDATA wrapping for HTML content
-- Cache appropriately (5 minute minimum)
-
-### Phase 3: IndieAuth Implementation
-
-**Authorization Endpoint**
-- Validate client_id parameter
-- Verify redirect_uri matches registered client
-- Generate authorization codes
-- Support PKCE flow
-
-**Token Endpoint**
-- Exchange authorization codes for access tokens
-- Validate code verifier for PKCE
-- Return token with appropriate scope
-- Store token with expiration
-
-**Token Verification**
-- Validate bearer tokens in Authorization header
-- Check token expiration
-- Verify scope for requested operation
-
-### Phase 4: Micropub Implementation
-
-**POST Endpoint**
-- Support JSON format (Content-Type: application/json)
-- Support form-encoded format (Content-Type: application/x-www-form-urlencoded)
-- Handle h-entry creation for notes
-- Return 201 Created with Location header
-- Validate authentication token
-
-**GET Endpoint**
-- Support q=config query (return supported features)
-- Support q=source query (return note source)
-- Return appropriate JSON responses
-
-**Micropub Request Structure (JSON)**
-```json
-{
-  "type": ["h-entry"],
-  "properties": {
-    "content": ["Note content here"]
-  }
-}
-```
-
-**Micropub Response**
-```
-HTTP/1.1 201 Created
-Location: https://example.com/note/abc123
-```
-
-### Phase 5: Web Interface
-
-**Homepage Requirements**
-- Display notes in reverse chronological order
-- Include proper h-entry microformats
-- Show note content (e-content class)
-- Include permalink (u-url class)
-- Display publish date (dt-published class)
-- Clean, readable typography
-- Mobile-responsive design
-
-**Note Permalink Page**
-- Full note display with microformats
-- Author information (h-card)
-- Timestamp and permalink
-- Link back to homepage
-
-**Admin Interface**
-- Simple markdown editor
-- Preview capability
-- Publish/Draft toggle
-- List of existing notes
-- Edit existing notes
-- Protected by authentication
-
-**Microformats Example**
-```html
-<article class="h-entry">
-  <div class="e-content">
-    <p>Note content goes here</p>
-  </div>
-  <footer>
-    <a class="u-url" href="/note/abc123">
-      <time class="dt-published" datetime="2024-01-01T12:00:00Z">
-        January 1, 2024
-      </time>
-    </a>
-  </footer>
-</article>
-```
-
-### Phase 6: Deployment
-
-**Requirements**
-- Self-hostable package
-- Single deployment unit
-- Persistent data storage
-- Environment-based configuration
-- Backup-friendly data format
-
-**Configuration Variables**
-- SITE_URL - Full URL of the site
-- SITE_TITLE - Site name for RSS feed
-- SITE_AUTHOR - Default author name
-- INDIEAUTH_ENDPOINT - IndieAuth provider URL
-- DATA_PATH - Location for persistent storage
-
-### Phase 7: Testing
-
-**Unit Tests Required**
-- Data layer operations
-- Micropub request parsing
-- IndieAuth token validation
-- Markdown rendering
-- Slug generation
-
-**Integration Tests**
-- Complete Micropub flow
-- IndieAuth authentication flow
-- RSS feed generation
-- API endpoint responses
-
-**Test Coverage Areas**
-- Note creation via web interface
-- Note creation via Micropub
-- Authentication flows
-- Feed validation
-- Error handling
-
-## Standards Compliance
-
-### IndieWeb Standards
-
-**Microformats2**
-- h-entry for notes
-- h-card for author information
-- e-content for note content
-- dt-published for timestamps
-- u-url for permalinks
-
-**IndieAuth**
-- OAuth 2.0 compatible flow
-- Support for authorization code grant
-- PKCE support recommended
-- Token introspection endpoint
-
-**Micropub**
-- JSON and form-encoded content types
-- Location header on creation
-- Configuration endpoint
-- Source endpoint for queries
-
-### Web Standards
-
-**HTTP**
-- Proper status codes (200, 201, 400, 401, 404)
-- Content-Type headers
-- Cache-Control headers where appropriate
-- CORS headers for API endpoints
-
-**RSS 2.0**
-- Valid XML structure
-- Required channel elements
-- Proper date formatting
-- GUID for each item
-- CDATA for HTML content
-
-**HTML**
-- Semantic HTML5 elements
-- Valid markup
-- Accessible forms
-- Mobile-responsive design
-
-## Security Considerations
-
-### Authentication
-- Validate all tokens before operations
-- Implement token expiration
-- Use secure token generation
-- Protect admin routes
-
-### Input Validation
-- Sanitize markdown input
-- Validate Micropub payloads
-- Prevent SQL injection
-- Escape HTML appropriately
-
-### HTTP Security
-- Use HTTPS in production
-- Set secure headers
-- Implement CSRF protection
-- Rate limit API endpoints
-
-## Performance Guidelines
-
-### Response Times
-- API responses < 100ms
-- Page loads < 200ms
-- RSS feed generation < 300ms
-
-### Caching Strategy
-- Cache RSS feed (5 minutes)
-- Cache static assets
-- Database query optimization
-- Minimize external dependencies
-
-### Resource Usage
-- Efficient database queries
-- Minimal memory footprint
-- Optimize HTML/CSS delivery
-- Compress responses
-
-## Testing Checklist
-
-- [ ] Create notes via web interface
-- [ ] Create notes via Micropub JSON
-- [ ] Create notes via Micropub form-encoded
-- [ ] RSS feed validates (W3C validator)
-- [ ] IndieAuth login flow works
-- [ ] Micropub client authentication
-- [ ] Notes display with proper microformats
-- [ ] API returns correct status codes
-- [ ] Markdown renders correctly
-- [ ] Slugs generate uniquely
-- [ ] Timestamps record accurately
-- [ ] Token expiration works
-- [ ] Rate limiting functions
-- [ ] All unit tests pass
-
-## Validation Tools
-
-**IndieWeb**
-- https://indiewebify.me/ - Verify microformats
-- https://indieauth.com/validate - Test IndieAuth
-- https://micropub.rocks/ - Micropub test suite
-
-**Web Standards**
-- https://validator.w3.org/feed/ - RSS validator
-- https://validator.w3.org/ - HTML validator
-- https://jsonlint.com/ - JSON validator
-
-## Resources
-
-### Specifications
-- IndieWeb Notes: https://indieweb.org/note
-- Micropub Spec: https://micropub.spec.indieweb.org
-- IndieAuth Spec: https://indieauth.spec.indieweb.org
-- Microformats2: http://microformats.org/wiki/h-entry
-- RSS 2.0 Spec: https://www.rssboard.org/rss-specification
-
-### Testing & Validation
-- Micropub Test Suite: https://micropub.rocks/
-- IndieAuth Testing: https://indieauth.com/
-- Microformats Parser: https://pin13.net/mf2/
-
-### Example Implementations
-- IndieWeb Examples: https://indieweb.org/examples
-- Micropub Clients: https://indieweb.org/Micropub/Clients
-
-## Development Principles
-
-1. **Minimal Code**: Every feature must justify its complexity
-2. **Standards First**: Follow specifications exactly
-3. **User Control**: User owns their data completely
-4. **No Lock-in**: Data must be portable and exportable
-5. **Progressive Enhancement**: Core functionality works without JavaScript
-6. **Documentation**: Code should be self-documenting
-7. **Test Coverage**: Critical paths must have tests
-
-## Future Considerations (Post-V1)
-
-Potential V2 features:
-- Webmentions support
-- Media uploads (photos)
-- Additional post types (articles, replies)
-- POSSE to Mastodon/ActivityPub
-- Full-text search
-- Draft/scheduled posts
-- Multiple IndieAuth providers
-- Backup/restore functionality
-- Import from other platforms
-- Export in multiple formats
-
-## Success Criteria
-
-The project is successful when:
-- A user can publish notes from any Micropub client
-- Notes appear in RSS readers immediately
-- The system runs on minimal resources
-- Code is readable and maintainable
-- All IndieWeb validators pass
-- Setup takes less than 5 minutes
-- System runs for months without intervention

CLAUDE.md

@@ -1,4 +1,91 @@
-- we use uv for python venv management in this project so commands involving python probably need to be run with uv
-- whenever you invoke agent-developer you will remind it to document what it does in docs/reports, update the changelog, and increment the version number where appropriate inline with docs/standards/versioning-strategy.md
-- when invoking agent-developer remind in that we are using uv and that any pyrhon commands need to be run with uv
-- when invoking agent-developer make sure it follows proper git protocol as defined in docs/standards/git-branching-strategy.md
+# Claude Agent Instructions
+
+This file contains operational instructions for Claude agents working on this project.
+
+## Python Environment
+
+- We use **uv** for Python virtual environment management
+- All Python commands must be run with `uv run` prefix
+- Example: `uv run pytest`, `uv run flask run`
+
+## Agent-Developer Protocol
+
+When invoking the agent-developer, always remind it to:
+
+1. **Document work in reports**
+   - Create implementation reports in `docs/reports/`
+   - Include date in filename: `YYYY-MM-DD-description.md`
+
+2. **Update the changelog**
+   - Add entries to `CHANGELOG.md` for user-facing changes
+   - Follow existing format
+
+3. **Version number management**
+   - Increment version numbers according to `docs/standards/versioning-strategy.md`
+   - Update version in `starpunk/__init__.py`
+
+4. **Follow git protocol**
+   - Adhere to git branching strategy in `docs/standards/git-branching-strategy.md`
+   - Create feature branches for non-trivial changes
+   - Write clear commit messages
+
+## Documentation Navigation
+
+### Understanding the docs/ Structure
+
+The `docs/` folder is organized by document type and purpose:
+
+- **`docs/architecture/`** - System design overviews, component diagrams, architectural patterns
+- **`docs/decisions/`** - Architecture Decision Records (ADRs), numbered sequentially (ADR-001, ADR-002, etc.)
+- **`docs/deployment/`** - Deployment guides, infrastructure setup, operations documentation
+- **`docs/design/`** - Detailed design documents, feature specifications, phase plans
+- **`docs/examples/`** - Example implementations, code samples, usage patterns
+- **`docs/projectplan/`** - Project roadmaps, implementation plans, feature scope definitions
+- **`docs/reports/`** - Implementation reports from developers (dated: YYYY-MM-DD-description.md)
+- **`docs/reviews/`** - Architectural reviews, design critiques, retrospectives
+- **`docs/standards/`** - Coding standards, conventions, processes, workflows
+
+### Where to Find Documentation
+
+- **Before implementing a feature**: Check `docs/decisions/` for relevant ADRs and `docs/design/` for specifications
+- **Understanding system architecture**: Start with `docs/architecture/overview.md`
+- **Coding guidelines**: See `docs/standards/` for language-specific standards and best practices
+- **Past implementation context**: Review `docs/reports/` for similar work (sorted by date)
+- **Project roadmap and scope**: Refer to `docs/projectplan/`
+
+### Where to Create New Documentation
+
+**Create an ADR (`docs/decisions/`)** when:
+- Making architectural decisions that affect system design
+- Choosing between competing technical approaches
+- Establishing patterns that others should follow
+- Format: `ADR-NNN-brief-title.md` (find next number sequentially)
+
+**Create a design doc (`docs/design/`)** when:
+- Planning a complex feature implementation
+- Detailing technical specifications
+- Documenting multi-phase development plans
+
+**Create an implementation report (`docs/reports/`)** when:
+- Completing significant development work
+- Documenting implementation details for architect review
+- Format: `YYYY-MM-DD-brief-description.md`
+
+**Update standards (`docs/standards/`)** when:
+- Establishing new coding conventions
+- Documenting processes or workflows
+- Creating checklists or guidelines
+
+### Key Documentation References
+
+- **Architecture**: See `docs/architecture/overview.md`
+- **Implementation Plan**: See `docs/projectplan/v1/implementation-plan.md`
+- **Feature Scope**: See `docs/projectplan/v1/feature-scope.md`
+- **Coding Standards**: See `docs/standards/python-coding-standards.md`
+- **Testing**: See `docs/standards/testing-checklist.md`
+
+## Project Philosophy
+
+"Every line of code must justify its existence. When in doubt, leave it out."
+
+Keep implementations minimal, standards-compliant, and maintainable.

docs/decisions/ADR-021-indieauth-provider-strategy.md

@@ -0,0 +1,541 @@
+# ADR-021: IndieAuth Provider Strategy
+
+## Status
+Accepted
+
+## Context
+
+StarPunk currently uses IndieLogin.com for authentication (ADR-005), but there is a critical misunderstanding about how IndieAuth works that needs to be addressed.
+
+### The Problem
+
+The user reported that IndieLogin.com requires manual client_id registration, making it unsuitable for self-hosted software where each installation has a different domain. This concern is based on a fundamental misunderstanding of how IndieAuth differs from traditional OAuth2.
+
+### How IndieAuth Actually Works
+
+Unlike traditional OAuth2 providers (GitHub, Google, etc.), **IndieAuth does not require pre-registration**:
+
+1. **DNS-Based Client Identification**: IndieAuth uses DNS as a replacement for client registration. A client application identifies itself using its own URL (e.g., `https://starpunk.example.com`), which serves as a unique identifier.
+
+2. **No Secrets Required**: All clients are public clients. There are no client secrets to manage or register.
+
+3. **Dynamic Redirect URI Verification**: Instead of pre-registered redirect URIs, applications publish their valid redirect URLs at their client_id URL, which authorization servers can discover.
+
+4. **Client Metadata Discovery**: Authorization servers can optionally fetch the client_id URL to display application information (name, logo) to users during authorization.
+
+### StarPunk's Authentication Architecture
+
+It is critical to understand that StarPunk has **two distinct authentication flows**:
+
+#### Flow 1: Admin Authentication (Current Misunderstanding)
+**Purpose**: Authenticate the StarPunk admin user to access the admin interface
+**Current Implementation**: Uses IndieLogin.com as described in ADR-005
+**How it works**:
+1. Admin visits `/admin/login`
+2. StarPunk redirects to IndieLogin.com with its own URL as `client_id`
+3. IndieLogin.com verifies the admin's identity
+4. Admin receives session cookie to access StarPunk admin
+
+**Registration Required?** NO - IndieAuth never requires registration
+
+#### Flow 2: Micropub Client Authorization (The Real Architecture)
+**Purpose**: Allow external Micropub clients to publish to StarPunk
+**How it works**:
+1. User configures their personal website (e.g., `https://alice.com`) with links to StarPunk's Micropub endpoint
+2. User opens Micropub client (Quill, Indigenous, etc.)
+3. Client discovers authorization/token endpoints from `https://alice.com` (NOT from StarPunk)
+4. Client gets access token from the discovered authorization server
+5. Client uses token to POST to StarPunk's Micropub endpoint
+6. StarPunk verifies the token
+
+**Who Provides Authorization?** The USER's chosen authorization server, not StarPunk
+
+### The Real Question
+
+StarPunk faces two architectural decisions:
+
+1. **Admin Authentication**: How should StarPunk administrators authenticate to the admin interface?
+2. **User Authorization**: Should StarPunk provide authorization/token endpoints for its users, or should users bring their own?
+
+## Research Findings
+
+### Alternative IndieAuth Services
+
+**IndieLogin.com** (Current)
+- Actively maintained by Aaron Parecki (IndieAuth spec editor)
+- Supports multiple auth methods: RelMeAuth, email, PGP, BlueSky OAuth (added 2025)
+- **No registration required** - this was the key misunderstanding
+- Free, community service
+- High availability
+
+**tokens.indieauth.com**
+- Provides token endpoint functionality
+- Separate from authorization endpoint
+- Also maintained by IndieWeb community
+- Also requires no registration
+
+**Other Services**
+- No other widely-used public IndieAuth providers found
+- Most implementations are self-hosted (see below)
+
+### Self-Hosted IndieAuth Implementations
+
+**Taproot/IndieAuth** (PHP)
+- Complexity: Moderate (7/10)
+- Full-featured: Authorization + token endpoints
+- PSR-7 compatible, well-tested (100% coverage)
+- Lightweight dependencies (Guzzle, mf2)
+- Production-ready since v0.1.0
+
+**Selfauth** (PHP)
+- Complexity: Low (3/10)
+- **Limitation**: Authorization endpoint ONLY (no token endpoint)
+- Cannot be used for Micropub (requires token endpoint)
+- Suitable only for simple authentication use cases
+
+**hacdias/indieauth** (Go)
+- Complexity: Moderate (6/10)
+- Provides both server and client libraries
+- Modern Go implementation
+- Used in production by author
+
+**Custom Implementation** (Python)
+- Complexity: High (8/10)
+- Must implement IndieAuth spec 1.1
+- Required endpoints:
+  - Authorization endpoint (authentication + code generation)
+  - Token endpoint (token issuance + verification)
+  - Metadata endpoint (server discovery)
+  - Introspection endpoint (token verification)
+- Must support:
+  - PKCE (required by spec)
+  - Client metadata discovery
+  - Profile URL validation
+  - Scope-based permissions
+  - Token revocation
+- Estimated effort: 40-60 hours for full implementation
+- Ongoing maintenance burden for security updates
+
+## Decision
+
+**Recommendation: Continue Using IndieLogin.com with Clarified Architecture**
+
+StarPunk should:
+
+1. **For Admin Authentication**: Continue using IndieLogin.com (no changes needed)
+   - No registration required
+   - Works out of the box for self-hosted installations
+   - Each StarPunk instance uses its own domain as client_id
+   - Zero maintenance burden
+
+2. **For Micropub Authorization**: Document that users must provide their own authorization server
+   - User configures their personal domain with IndieAuth endpoints
+   - User can choose:
+     - IndieLogin.com (easiest)
+     - Self-hosted IndieAuth server (advanced)
+     - Any other IndieAuth-compliant service
+   - StarPunk only verifies tokens, doesn't issue them
+
+3. **For V2 Consideration**: Optionally provide built-in authorization server
+   - Would allow StarPunk to be a complete standalone solution
+   - Users could use StarPunk's domain as their identity
+   - Requires implementing full IndieAuth server (40-60 hours)
+   - Only pursue if there is strong user demand
+
+## Rationale
+
+### Why Continue with IndieLogin.com
+
+**Simplicity Score: 10/10**
+- Zero configuration required
+- No registration process
+- Works immediately for any domain
+- Battle-tested by IndieWeb community
+- The original concern (manual registration) does not exist
+
+**Fitness Score: 10/10**
+- Perfect for single-user CMS
+- Aligns with IndieWeb principles
+- User controls their identity
+- No lock-in (user can switch authorization servers)
+
+**Maintenance Score: 10/10**
+- Externally maintained
+- Security updates handled by community
+- No code to maintain in StarPunk
+- Proven reliability and uptime
+
+**Standards Compliance: Pass**
+- Full IndieAuth spec compliance
+- OAuth 2.0 compatible
+- Supports modern extensions (PKCE, client metadata)
+
+### Why Not Self-Host (for V1)
+
+**Complexity vs Benefit**
+- Self-hosting adds 40-60 hours of development
+- Ongoing security maintenance burden
+- Solves a problem that doesn't exist (no registration required)
+- Violates "every line of code must justify its existence"
+
+**User Perspective**
+- Users already need a domain for IndieWeb
+- Most users will use IndieLogin.com or similar service
+- Advanced users can self-host their own IndieAuth server
+- StarPunk doesn't need to solve this problem
+
+**Alternative Philosophy**
+- StarPunk is a Micropub SERVER, not an authorization server
+- Separation of concerns: publishing vs identity
+- Users should control their own identity infrastructure
+- StarPunk focuses on doing one thing well: publishing notes
+
+## Architectural Clarification
+
+### Current Architecture (Correct Understanding)
+
+```
+┌─────────────────────────────────────────────────────────────┐
+│ Flow 1: Admin Authentication                                │
+│                                                               │
+│ StarPunk Admin                                               │
+│       ↓                                                       │
+│ StarPunk (/admin/login)                                      │
+│       ↓ (redirect with client_id=https://starpunk.example)  │
+│ IndieLogin.com (verifies admin identity)                     │
+│       ↓ (returns verified "me" URL)                          │
+│ StarPunk (creates session)                                   │
+└─────────────────────────────────────────────────────────────┘
+
+┌─────────────────────────────────────────────────────────────┐
+│ Flow 2: Micropub Publishing                                  │
+│                                                               │
+│ User's Website (https://alice.com)                           │
+│   Links to:                                                   │
+│     - authorization_endpoint (IndieLogin or self-hosted)     │
+│     - token_endpoint (tokens.indieauth.com or self-hosted)   │
+│     - micropub endpoint (StarPunk)                           │
+│       ↓                                                       │
+│ Micropub Client (Quill, Indigenous)                          │
+│       ↓ (discovers endpoints from alice.com)                 │
+│ Authorization Server (user's choice, NOT StarPunk)           │
+│       ↓ (issues access token)                                │
+│ Micropub Client                                              │
+│       ↓ (POST with Bearer token)                             │
+│ StarPunk Micropub Endpoint                                   │
+│       ↓ (verifies token with authorization server)           │
+│ StarPunk (creates note)                                      │
+└─────────────────────────────────────────────────────────────┘
+```
+
+### What StarPunk Implements
+
+**Currently Implemented** (ADR-005):
+- Session-based admin authentication via IndieLogin.com
+- CSRF protection (state tokens)
+- Session management
+- Admin route protection
+
+**Must Be Implemented** (for Micropub):
+- Token verification endpoint (query user's token endpoint)
+- Bearer token extraction from Authorization header
+- Scope verification (check token has "create" permission)
+- Token storage/caching (optional, for performance)
+
+**Does NOT Implement** (users provide these):
+- Authorization endpoint (users use IndieLogin.com or self-hosted)
+- Token endpoint (users use tokens.indieauth.com or self-hosted)
+- User identity management (users own their domains)
+
+## Implementation Outline
+
+### No Changes Needed for Admin Auth
+The current IndieLogin.com integration (ADR-005) is correct and requires no changes. Each self-hosted StarPunk installation uses its own domain as `client_id` without any registration.
+
+### Required for Micropub Support
+
+#### 1. Token Verification
+```python
+def verify_micropub_token(bearer_token, expected_me):
+    """
+    Verify access token by querying the token endpoint
+
+    Args:
+        bearer_token: Token from Authorization header
+        expected_me: Expected user identity (from StarPunk config)
+
+    Returns:
+        dict: Token info (me, client_id, scope) if valid
+        None: If token is invalid
+    """
+    # Discover token endpoint from expected_me domain
+    token_endpoint = discover_token_endpoint(expected_me)
+
+    # Verify token
+    response = httpx.get(
+        token_endpoint,
+        headers={'Authorization': f'Bearer {bearer_token}'},
+        params={'token': bearer_token}
+    )
+
+    if response.status_code != 200:
+        return None
+
+    data = response.json()
+
+    # Verify token is for expected user
+    if data.get('me') != expected_me:
+        return None
+
+    # Verify token has required scope
+    scope = data.get('scope', '')
+    if 'create' not in scope:
+        return None
+
+    return data
+```
+
+#### 2. Endpoint Discovery
+```python
+def discover_token_endpoint(me_url):
+    """
+    Discover token endpoint from user's profile URL
+
+    Checks for:
+    1. indieauth-metadata endpoint
+    2. Fallback to direct token_endpoint link
+    """
+    response = httpx.get(me_url)
+
+    # Check HTTP Link header
+    link_header = response.headers.get('Link', '')
+    # Parse link header for indieauth-metadata
+
+    # Check HTML <link> tags
+    # Parse HTML for <link rel="indieauth-metadata">
+
+    # Fetch metadata endpoint
+    # Return token_endpoint URL
+```
+
+#### 3. Micropub Endpoint Protection
+```python
+@app.route('/api/micropub', methods=['POST'])
+def micropub_endpoint():
+    # Extract bearer token
+    auth_header = request.headers.get('Authorization', '')
+    if not auth_header.startswith('Bearer '):
+        return {'error': 'unauthorized'}, 401
+
+    bearer_token = auth_header[7:]  # Remove "Bearer "
+
+    # Verify token
+    token_info = verify_micropub_token(bearer_token, ADMIN_ME)
+    if not token_info:
+        return {'error': 'forbidden'}, 403
+
+    # Process Micropub request
+    # Create note
+    # Return 201 with Location header
+```
+
+### Documentation Updates
+
+#### For Users (Setup Guide)
+```markdown
+# Setting Up Your IndieWeb Identity
+
+To publish to StarPunk via Micropub clients:
+
+1. **Add Links to Your Website**
+   Add these to your personal website's <head>:
+   ```html
+   <link rel="authorization_endpoint" href="https://indielogin.com/auth">
+   <link rel="token_endpoint" href="https://tokens.indieauth.com/token">
+   <link rel="micropub" href="https://your-starpunk.example.com/api/micropub">
+   ```
+
+2. **Configure StarPunk**
+   Set your website URL in StarPunk configuration:
+   ```
+   ADMIN_ME=https://your-website.com
+   ```
+
+3. **Use a Micropub Client**
+   - Quill: https://quill.p3k.io
+   - Indigenous (mobile app)
+   - Or any Micropub-compatible client
+
+4. **Advanced: Self-Host Authorization**
+   Instead of IndieLogin.com, you can run your own IndieAuth server.
+   See: https://indieweb.org/IndieAuth#Software
+```
+
+#### For Developers (Architecture Docs)
+Update `/home/phil/Projects/starpunk/docs/architecture/overview.md` to clarify the two authentication flows and explain that StarPunk is a Micropub server, not an authorization server.
+
+## Consequences
+
+### Positive
+- **No development needed**: Current architecture is correct
+- **No registration required**: Works for self-hosted installations out of the box
+- **User control**: Users choose their own authorization provider
+- **Standards compliant**: Proper separation of Micropub server and authorization server
+- **Simple**: StarPunk focuses on publishing, not identity management
+- **Flexible**: Users can switch authorization providers without affecting StarPunk
+
+### Negative
+- **User education required**: Must explain that they need to configure their domain
+- **Not standalone**: StarPunk cannot function completely independently (requires external auth)
+- **Dependency**: Relies on external services (mitigated: user chooses service)
+
+### Neutral
+- **Architectural purity**: Follows IndieWeb principle of separation of concerns
+- **Complexity distribution**: Moves authorization complexity to where it belongs (identity provider)
+
+## V2 Considerations
+
+If there is user demand for a more integrated solution, V2 could add:
+
+### Option A: Embedded IndieAuth Server
+**Pros**:
+- StarPunk becomes completely standalone
+- Users can use StarPunk domain as their identity
+- One-step setup for non-technical users
+
+**Cons**:
+- 40-60 hours development effort
+- Ongoing security maintenance
+- Adds complexity to codebase
+- May violate simplicity principle
+
+**Decision**: Only implement if users request it
+
+### Option B: Hybrid Mode
+**Pros**:
+- Advanced users can use external auth (current behavior)
+- Simple users can use built-in auth
+- Best of both worlds
+
+**Cons**:
+- Even more complexity
+- Two codepaths to maintain
+- Configuration complexity
+
+**Decision**: Defer until V2 user feedback
+
+### Option C: StarPunk-Hosted Service
+**Pros**:
+- One StarPunk authorization server for all installations
+- Users register their StarPunk instance once
+- Simple for end users
+
+**Cons**:
+- Centralized service (not indie)
+- Single point of failure
+- Hosting/maintenance burden
+- Violates IndieWeb principles
+
+**Decision**: Rejected - not aligned with IndieWeb values
+
+## Alternatives Considered
+
+### Alternative 1: Self-Host IndieAuth (Taproot/PHP)
+**Evaluation**:
+- Complexity: Would require running PHP alongside Python
+- Deployment: Two separate applications to manage
+- Maintenance: Security updates for both Python and PHP
+- Verdict: **Rejected** - adds unnecessary complexity
+
+### Alternative 2: Port Taproot to Python
+**Evaluation**:
+- Effort: 40-60 hours development
+- Maintenance: Full responsibility for security
+- Value: Solves a non-existent problem (no registration needed)
+- Verdict: **Rejected** - violates simplicity principle
+
+### Alternative 3: Use OAuth2 Service (GitHub, Google)
+**Evaluation**:
+- Simplicity: Very simple to implement
+- IndieWeb Compliance: **FAIL** - not IndieWeb compatible
+- User Ownership: **FAIL** - users don't own their identity
+- Verdict: **Rejected** - violates core requirements
+
+### Alternative 4: Password Authentication
+**Evaluation**:
+- Simplicity: Moderate (password hashing, reset flows)
+- IndieWeb Compliance: **FAIL** - not IndieWeb authentication
+- Security: Must implement password best practices
+- Verdict: **Rejected** - not aligned with IndieWeb principles
+
+### Alternative 5: Use IndieAuth as Library (Client Side)
+**Evaluation**:
+- Would make StarPunk act as IndieAuth client to discover user's auth server
+- Current architecture already does this for Micropub
+- Admin interface uses simpler session-based auth
+- Verdict: **Already implemented** for Micropub flow
+
+## Migration Plan
+
+### From Current Broken Understanding → Correct Understanding
+
+**No Code Changes Required**
+
+1. **Update Documentation**
+   - Clarify that no registration is needed
+   - Explain the two authentication flows
+   - Document Micropub setup for users
+
+2. **Complete Micropub Implementation**
+   - Implement token verification
+   - Implement endpoint discovery
+   - Add Bearer token authentication
+
+3. **User Education**
+   - Create setup guide explaining domain configuration
+   - Provide example HTML snippets
+   - Link to IndieWeb resources
+
+### Timeline
+- Documentation updates: 2 hours
+- Micropub token verification: 8 hours
+- Testing with real Micropub clients: 4 hours
+- Total: ~14 hours
+
+## References
+
+### IndieAuth Specifications
+- [IndieAuth Spec](https://indieauth.spec.indieweb.org/) - Official W3C specification
+- [OAuth 2.0](https://oauth.net/2/) - Underlying OAuth 2.0 foundation
+- [Client Identifier](https://www.oauth.com/oauth2-servers/indieauth/) - How client_id works in IndieAuth
+
+### Services
+- [IndieLogin.com](https://indielogin.com/) - Public IndieAuth service (no registration)
+- [IndieLogin API Docs](https://indielogin.com/api) - Integration documentation
+- [tokens.indieauth.com](https://tokens.indieauth.com/token) - Public token endpoint service
+
+### Self-Hosted Implementations
+- [Taproot/IndieAuth](https://github.com/Taproot/indieauth) - PHP implementation
+- [hacdias/indieauth](https://github.com/hacdias/indieauth) - Go implementation
+- [Selfauth](https://github.com/Inklings-io/selfauth) - Simple auth-only PHP
+
+### IndieWeb Resources
+- [IndieWeb Wiki: IndieAuth](https://indieweb.org/IndieAuth) - Community documentation
+- [IndieWeb Wiki: Micropub](https://indieweb.org/Micropub) - Micropub overview
+- [IndieWeb Wiki: authorization-endpoint](https://indieweb.org/authorization-endpoint) - Endpoint details
+
+### Related ADRs
+- [ADR-005: IndieLogin Authentication](/home/phil/Projects/starpunk/docs/decisions/ADR-005-indielogin-authentication.md) - Original auth decision
+- [ADR-010: Authentication Module Design](/home/phil/Projects/starpunk/docs/decisions/ADR-010-authentication-module-design.md) - Auth module structure
+
+### Community Examples
+- [Aaron Parecki's IndieAuth Notes](https://aaronparecki.com/2025/10/08/4/cimd) - Client ID metadata adoption
+- [Jamie Tanna's IndieAuth Server](https://www.jvt.me/posts/2020/12/09/personal-indieauth-server/) - Self-hosted implementation
+- [Micropub Servers](https://indieweb.org/Micropub/Servers) - Examples of Micropub implementations
+
+---
+
+**Document Version**: 1.0
+**Created**: 2025-11-19
+**Author**: StarPunk Architecture Team (agent-architect)
+**Status**: Accepted

docs/decisions/ADR-023-indieauth-client-identification.md

@@ -1,4 +1,4 @@
-# ADR-006: IndieAuth Client Identification Strategy
+# ADR-023: IndieAuth Client Identification Strategy
 
 ## Status
 Accepted

docs/decisions/ADR-024-static-identity-page.md

@@ -1,4 +1,4 @@
-# ADR-010: Static HTML Identity Pages for IndieAuth
+# ADR-024: Static HTML Identity Pages for IndieAuth
 
 ## Status
 Accepted

docs/decisions/ADR-025-indieauth-pkce-authentication.md

@@ -1,4 +1,4 @@
-# ADR-019: IndieAuth Correct Implementation Based on IndieLogin.com API
+# ADR-025: IndieAuth Correct Implementation Based on IndieLogin.com API
 
 ## Status
 

docs/decisions/ADR-026-indieauth-token-exchange-compliance.md

@@ -0,0 +1,84 @@
+# ADR-026: IndieAuth Token Exchange Compliance
+
+## Status
+Accepted
+
+## Context
+StarPunk's IndieAuth implementation is failing to authenticate with certain providers (specifically gondulf.thesatelliteoflove.com) during the token exchange phase. The provider is rejecting our token exchange requests with a "missing grant_type" error.
+
+Our current implementation sends:
+- `code`
+- `client_id`
+- `redirect_uri`
+- `code_verifier` (for PKCE)
+
+But does NOT include `grant_type=authorization_code`.
+
+## Decision
+StarPunk MUST include `grant_type=authorization_code` in all token exchange requests to be compliant with both OAuth 2.0 RFC 6749 and IndieAuth specifications.
+
+## Rationale
+
+### OAuth 2.0 RFC 6749 Compliance
+RFC 6749 Section 4.1.3 explicitly states that `grant_type` is a REQUIRED parameter with the value MUST be set to "authorization_code" for the authorization code grant flow.
+
+### IndieAuth Specification
+While the IndieAuth specification (W3C TR) doesn't use explicit RFC 2119 language (MUST/REQUIRED) for the grant_type parameter, it:
+1. Lists `grant_type=authorization_code` as part of the token request parameters in Section 6.3.1
+2. Shows it in all examples (Example 12)
+3. States that IndieAuth "builds upon the OAuth 2.0 [RFC6749] Framework"
+
+Since IndieAuth builds on OAuth 2.0, and OAuth 2.0 requires this parameter, IndieAuth implementations should include it.
+
+### Provider Compliance
+The provider (gondulf.thesatelliteoflove.com) is **correctly following the specifications** by requiring the `grant_type` parameter.
+
+## Consequences
+
+### Positive
+- Full compliance with OAuth 2.0 RFC 6749
+- Compatibility with all spec-compliant IndieAuth providers
+- Clear, standard-compliant token exchange requests
+
+### Negative
+- Requires immediate code change to add the missing parameter
+- May reveal other non-compliant providers that don't check for this parameter
+
+## Implementation Requirements
+
+The token exchange request MUST include these parameters:
+```
+grant_type=authorization_code  # REQUIRED by OAuth 2.0
+code={authorization_code}      # REQUIRED
+client_id={client_url}         # REQUIRED
+redirect_uri={redirect_url}    # REQUIRED if used in initial request
+me={user_profile_url}          # REQUIRED by IndieAuth (extension to OAuth)
+```
+
+### Note on PKCE
+The `code_verifier` parameter currently being sent is NOT part of the IndieAuth specification. IndieAuth does not mention PKCE (RFC 7636) support. However:
+- Including it shouldn't break compliant providers (they should ignore unknown parameters)
+- It provides additional security for public clients
+- Consider making PKCE optional or detecting provider support
+
+## Alternatives Considered
+
+### Alternative 1: Argue for Optional grant_type
+**Rejected**: While IndieAuth could theoretically make grant_type optional since there's only one grant type, this would break compatibility with OAuth 2.0 compliant libraries and providers.
+
+### Alternative 2: Provider-specific workarounds
+**Rejected**: Creating provider-specific code paths would violate the principle of standards compliance and create maintenance burden.
+
+## Recommendation
+
+**Immediate Action Required**:
+1. Add `grant_type=authorization_code` to all token exchange requests
+2. Maintain the existing parameters
+3. Consider making PKCE optional or auto-detecting provider support
+
+**StarPunk is at fault** - the implementation is missing a required OAuth 2.0 parameter that IndieAuth inherits.
+
+## References
+- [OAuth 2.0 RFC 6749 Section 4.1.3](https://datatracker.ietf.org/doc/html/rfc6749#section-4.1.3)
+- [IndieAuth W3C TR Section 6.3.1](https://www.w3.org/TR/indieauth/#token-request)
+- [PKCE RFC 7636](https://datatracker.ietf.org/doc/html/rfc7636) (not part of IndieAuth spec)

docs/decisions/ADR-027-indieauth-authentication-endpoint-correction.md

@@ -0,0 +1,188 @@
+# ADR-027: IndieAuth Authentication Endpoint Correction
+
+## Status
+Accepted
+
+## Context
+
+StarPunk is encountering authentication failures with certain IndieAuth providers (specifically gondulf.thesatelliteoflove.com). After investigation, we discovered that StarPunk is incorrectly using the **token endpoint** for authentication-only flows, when it should be using the **authorization endpoint**.
+
+### The Problem
+
+When attempting to authenticate with gondulf.thesatelliteoflove.com, the provider returns:
+```json
+{
+  "error": "invalid_grant",
+  "error_description": "Authorization code must be redeemed at the authorization endpoint"
+}
+```
+
+StarPunk is currently sending authentication code redemption requests to `/token` when it should be sending them to the authorization endpoint for authentication-only flows.
+
+### IndieAuth Specification Analysis
+
+According to the W3C IndieAuth specification (https://www.w3.org/TR/indieauth/):
+
+1. **Authentication-only flows** (Section 5.4):
+   - Used when the client only needs to verify user identity
+   - Code redemption happens at the **authorization endpoint**
+   - No `grant_type` parameter is used
+   - Response contains only `{"me": "user-url"}`
+
+2. **Authorization flows** (Section 6.3):
+   - Used when the client needs an access token for API access
+   - Code redemption happens at the **token endpoint**
+   - Requires `grant_type=authorization_code` parameter
+   - Response contains access token and user identity
+
+### Current StarPunk Implementation
+
+StarPunk's current code in `/home/phil/Projects/starpunk/starpunk/auth.py` (lines 410-419):
+
+```python
+token_exchange_data = {
+    "grant_type": "authorization_code",  # WRONG for authentication-only
+    "code": code,
+    "client_id": current_app.config["SITE_URL"],
+    "redirect_uri": f"{current_app.config['SITE_URL']}auth/callback",
+    "code_verifier": code_verifier,  # PKCE verification
+}
+
+token_url = f"{current_app.config['INDIELOGIN_URL']}/token"  # WRONG endpoint
+```
+
+This implementation has two errors:
+1. Uses `/token` endpoint instead of authorization endpoint
+2. Includes `grant_type` parameter which should not be present for authentication-only flows
+
+## Decision
+
+StarPunk must correct its IndieAuth authentication implementation to comply with the specification:
+
+1. **Use the authorization endpoint** for code redemption in authentication-only flows
+2. **Remove the `grant_type` parameter** from authentication requests
+3. **Keep PKCE parameters** (`code_verifier`) as they are still required
+
+## Rationale
+
+### Why This Matters
+
+1. **Standards Compliance**: The IndieAuth specification clearly distinguishes between authentication and authorization flows
+2. **Provider Compatibility**: Some providers (like gondulf) strictly enforce the specification
+3. **Correct Semantics**: StarPunk only needs to verify admin identity, not obtain an access token
+
+### Authentication vs Authorization
+
+StarPunk's admin login is an **authentication-only** use case:
+- We only need to verify the admin's identity (`me` URL)
+- We don't need an access token to access external resources
+- We create our own session after successful authentication
+
+This is fundamentally different from Micropub client authorization where:
+- External clients need access tokens
+- Tokens are used to authorize API access
+- The token endpoint is the correct choice
+
+## Implementation
+
+### Required Changes
+
+In `/home/phil/Projects/starpunk/starpunk/auth.py`, the `handle_callback` function must be updated:
+
+```python
+def handle_callback(code: str, state: str, iss: Optional[str] = None) -> Optional[str]:
+    # ... existing state verification code ...
+
+    # Prepare authentication request (NOT token exchange)
+    auth_data = {
+        # NO grant_type parameter for authentication-only flows
+        "code": code,
+        "client_id": current_app.config["SITE_URL"],
+        "redirect_uri": f"{current_app.config['SITE_URL']}auth/callback",
+        "code_verifier": code_verifier,  # PKCE verification still required
+    }
+
+    # Use authorization endpoint (NOT token endpoint)
+    # The same endpoint used for the initial authorization request
+    auth_url = f"{current_app.config['INDIELOGIN_URL']}/auth"  # or /authorize
+
+    # Exchange code for identity (authentication-only)
+    response = httpx.post(
+        auth_url,
+        data=auth_data,
+        timeout=10.0,
+    )
+
+    # Response will be: {"me": "https://user.example.com"}
+    # NOT an access token response
+```
+
+### Endpoint Discovery Consideration
+
+IndieAuth providers may use different paths for their authorization endpoint:
+- IndieLogin.com uses `/auth`
+- Some providers use `/authorize`
+- The gondulf provider appears to use its root domain as the authorization endpoint
+
+The correct approach is to:
+1. Discover the authorization endpoint from the provider's metadata
+2. Use the same endpoint for both authorization initiation and code redemption
+3. Store the discovered endpoint during the initial authorization request
+
+## Consequences
+
+### Positive
+- **Specification Compliance**: Correctly implements IndieAuth authentication flow
+- **Provider Compatibility**: Works with strict IndieAuth implementations
+- **Semantic Correctness**: Uses the right flow for the use case
+
+### Negative
+- **Breaking Change**: May affect compatibility with providers that accept both endpoints
+- **Testing Required**: Need to verify with multiple IndieAuth providers
+
+### Migration Impact
+- Existing sessions remain valid (no database changes)
+- Only affects new login attempts
+- Should be transparent to users
+
+## Testing Strategy
+
+Test with multiple IndieAuth providers:
+1. **IndieLogin.com** - Current provider (should continue working)
+2. **gondulf.thesatelliteoflove.com** - Strict implementation
+3. **tokens.indieauth.com** - Token-only endpoint (should fail for auth)
+4. **Self-hosted implementations** - Various compliance levels
+
+## Alternatives Considered
+
+### Alternative 1: Support Both Endpoints
+Attempt token endpoint first, fall back to authorization endpoint on failure.
+- **Pros**: Maximum compatibility
+- **Cons**: Not specification-compliant, adds complexity
+- **Verdict**: Rejected - violates standards
+
+### Alternative 2: Make Endpoint Configurable
+Allow admin to configure which endpoint to use.
+- **Pros**: Flexible for different providers
+- **Cons**: Confusing for users, not needed if we follow spec
+- **Verdict**: Rejected - specification is clear
+
+### Alternative 3: Always Use Token Endpoint
+Continue current implementation, document incompatibility.
+- **Pros**: No code changes needed
+- **Cons**: Violates specification, limits provider choice
+- **Verdict**: Rejected - incorrect implementation
+
+## References
+
+- [IndieAuth Specification Section 5.4](https://www.w3.org/TR/indieauth/#authentication-response): Authorization Code Verification for authentication flows
+- [IndieAuth Specification Section 6.3](https://www.w3.org/TR/indieauth/#token-response): Token Endpoint for authorization flows
+- [IndieAuth Authentication vs Authorization](https://indieweb.org/IndieAuth#Authentication_vs_Authorization): Community documentation
+- [ADR-021: IndieAuth Provider Strategy](/home/phil/Projects/starpunk/docs/decisions/ADR-021-indieauth-provider-strategy.md): Related architectural decision
+
+---
+
+**Document Version**: 1.0
+**Created**: 2025-11-22
+**Author**: StarPunk Architecture Team
+**Status**: Accepted

docs/reports/2025-11-22-authorization-endpoint-fix.md

@@ -0,0 +1,93 @@
+# IndieAuth Authentication Endpoint Correction
+
+**Date**: 2025-11-22
+**Version**: 0.9.4
+**Type**: Bug Fix
+
+## Summary
+
+Corrected the IndieAuth code redemption endpoint from `/token` to `/authorize` for authentication-only flows, and removed the unnecessary `grant_type` parameter.
+
+## Problem
+
+StarPunk was using the wrong endpoint for IndieAuth authentication. Per the IndieAuth specification:
+
+- **Authentication-only flows** (identity verification): Use the **authorization endpoint** (`/authorize`)
+- **Authorization flows** (getting access tokens): Use the **token endpoint** (`/token`)
+
+StarPunk only needs identity verification (to check if the user is the admin), so it should POST to the authorization endpoint, not the token endpoint.
+
+Additionally, the `grant_type` parameter is only required for token endpoint requests (OAuth 2.0 access token requests), not for authentication-only code redemption at the authorization endpoint.
+
+### IndieAuth Spec Reference
+
+From the IndieAuth specification:
+> If the client only needs to know the user who logged in, the client will exchange the authorization code at the authorization endpoint. If the client needs an access token, the client will exchange the authorization code at the token endpoint.
+
+## Solution
+
+1. Changed the endpoint from `/token` to `/authorize`
+2. Removed the `grant_type` parameter (not needed for authentication-only)
+3. Updated debug logging to reflect "code verification" instead of "token exchange"
+
+### Before
+
+```python
+token_exchange_data = {
+    "grant_type": "authorization_code",  # Not needed for authentication-only
+    "code": code,
+    "client_id": current_app.config["SITE_URL"],
+    "redirect_uri": f"{current_app.config['SITE_URL']}auth/callback",
+    "code_verifier": code_verifier,
+}
+
+token_url = f"{current_app.config['INDIELOGIN_URL']}/token"  # Wrong endpoint
+```
+
+### After
+
+```python
+token_exchange_data = {
+    "code": code,
+    "client_id": current_app.config["SITE_URL"],
+    "redirect_uri": f"{current_app.config['SITE_URL']}auth/callback",
+    "code_verifier": code_verifier,
+}
+
+# Use authorization endpoint for authentication-only flow (identity verification)
+token_url = f"{current_app.config['INDIELOGIN_URL']}/authorize"
+```
+
+## Files Modified
+
+1. **`starpunk/auth.py`**
+   - Line 410-423: Removed `grant_type`, changed endpoint to `/authorize`, added explanatory comments
+   - Line 434: Updated log message from "token exchange request" to "code verification request to authorization endpoint"
+   - Line 445: Updated comment to clarify authentication-only flow
+   - Line 455: Updated log message from "token exchange response" to "code verification response"
+
+2. **`starpunk/__init__.py`**
+   - Version bumped from 0.9.3 to 0.9.4
+
+3. **`CHANGELOG.md`**
+   - Added 0.9.4 release notes
+
+## Testing
+
+- All tests pass at the same rate as before (no new failures introduced)
+- 28 pre-existing test failures remain (related to OAuth metadata and h-app tests for removed functionality from v0.8.0)
+- 486 tests pass
+
+## Technical Context
+
+The v0.9.3 fix that added `grant_type` was based on an incorrect assumption that IndieLogin.com uses the token endpoint for all code redemption. However:
+
+1. IndieLogin.com follows the IndieAuth spec which distinguishes between authentication and authorization
+2. For authentication-only (which is all StarPunk needs), the authorization endpoint is correct
+3. The token endpoint is only for obtaining access tokens (which StarPunk doesn't need)
+
+## References
+
+- [IndieAuth Specification - Authentication](https://indieauth.spec.indieweb.org/#authentication)
+- [IndieAuth Specification - Authorization Endpoint](https://indieauth.spec.indieweb.org/#authorization-endpoint)
+- ADR-022: IndieAuth Authentication Endpoint Correction (if created)

docs/reports/2025-11-22-grant-type-fix.md

@@ -0,0 +1,68 @@
+# IndieAuth Token Exchange grant_type Fix
+
+**Date**: 2025-11-22
+**Version**: 0.9.3
+**Type**: Bug Fix
+
+## Summary
+
+Added the required `grant_type=authorization_code` parameter to the IndieAuth token exchange request.
+
+## Problem
+
+The token exchange request in `starpunk/auth.py` was missing the `grant_type` parameter. Per OAuth 2.0 spec (RFC 6749 Section 4.1.3), the token exchange request MUST include:
+
+```
+grant_type=authorization_code
+```
+
+Some IndieAuth providers that strictly validate OAuth 2.0 compliance would reject the token exchange request without this parameter.
+
+## Solution
+
+Added `"grant_type": "authorization_code"` to the `token_exchange_data` dictionary in the `handle_callback` function.
+
+### Before
+
+```python
+token_exchange_data = {
+    "code": code,
+    "client_id": current_app.config["SITE_URL"],
+    "redirect_uri": f"{current_app.config['SITE_URL']}auth/callback",
+    "code_verifier": code_verifier,
+}
+```
+
+### After
+
+```python
+token_exchange_data = {
+    "grant_type": "authorization_code",
+    "code": code,
+    "client_id": current_app.config["SITE_URL"],
+    "redirect_uri": f"{current_app.config['SITE_URL']}auth/callback",
+    "code_verifier": code_verifier,
+}
+```
+
+## Files Modified
+
+1. **`starpunk/auth.py`** (line 412)
+   - Added `"grant_type": "authorization_code"` to token_exchange_data
+
+2. **`starpunk/__init__.py`** (line 156)
+   - Version bumped from 0.9.2 to 0.9.3
+
+3. **`CHANGELOG.md`**
+   - Added 0.9.3 release notes
+
+## Testing
+
+- Module imports successfully
+- Pre-existing test failures are unrelated (OAuth metadata and h-app tests for removed functionality)
+- No new test failures introduced
+
+## References
+
+- RFC 6749 Section 4.1.3: Access Token Request
+- IndieAuth specification

docs/reports/ADR-025-implementation-report.md

@@ -1,4 +1,4 @@
-# ADR-019 Implementation Report
+# ADR-025 Implementation Report
 
 **Date**: 2025-11-19
 **Version**: 0.8.0
@@ -6,7 +6,7 @@
 
 ## Summary
 
-Successfully implemented ADR-019: IndieAuth Correct Implementation Based on IndieLogin.com API with PKCE support. This fixes the critical authentication bug that has been present since v0.7.0.
+Successfully implemented ADR-025: IndieAuth Correct Implementation Based on IndieLogin.com API with PKCE support. This fixes the critical authentication bug that has been present since v0.7.0.
 
 ## Implementation Completed
 
@@ -53,8 +53,8 @@ Successfully implemented ADR-019: IndieAuth Correct Implementation Based on Indi
 - ✅ Updated version to 0.8.0 in starpunk/__init__.py
 - ✅ Updated CHANGELOG.md with v0.8.0 entry
 - ✅ Added known issues notes to v0.7.0 and v0.7.1 CHANGELOG entries
-- ✅ Updated ADR-016 status to "Superseded by ADR-019"
-- ✅ Updated ADR-017 status to "Superseded by ADR-019"
+- ✅ Updated ADR-016 status to "Superseded by ADR-025"
+- ✅ Updated ADR-017 status to "Superseded by ADR-025"
 - ✅ Created TODO_TEST_UPDATES.md documenting test updates needed
 
 ## Lines of Code Changes
@@ -201,16 +201,16 @@ ALTER TABLE auth_state ADD COLUMN code_verifier TEXT NOT NULL DEFAULT '';
 
 ## References
 
-- **ADR-019**: docs/decisions/ADR-019-indieauth-pkce-authentication.md
+- **ADR-025**: docs/decisions/ADR-025-indieauth-pkce-authentication.md
 - **Design Doc**: docs/designs/indieauth-pkce-authentication.md
-- **Versioning Guidance**: docs/reports/ADR-019-versioning-guidance.md
-- **Implementation Summary**: docs/reports/ADR-019-implementation-summary.md
+- **Versioning Guidance**: docs/reports/ADR-025-versioning-guidance.md
+- **Implementation Summary**: docs/reports/ADR-025-implementation-summary.md
 - **RFC 7636**: PKCE specification
 - **IndieLogin.com API**: https://indielogin.com/api
 
 ## Conclusion
 
-ADR-019 has been successfully implemented. The IndieAuth authentication flow now correctly implements PKCE as required by IndieLogin.com, uses the correct API endpoints, and validates the issuer. Unnecessary features from v0.7.0 and v0.7.1 have been removed, resulting in cleaner, more maintainable code.
+ADR-025 has been successfully implemented. The IndieAuth authentication flow now correctly implements PKCE as required by IndieLogin.com, uses the correct API endpoints, and validates the issuer. Unnecessary features from v0.7.0 and v0.7.1 have been removed, resulting in cleaner, more maintainable code.
 
 The implementation follows the architect's specifications exactly and maintains the project's minimal code philosophy. Version 0.8.0 is ready for testing and deployment.
 

docs/reports/ADR-025-implementation-summary.md

@@ -1,4 +1,4 @@
-# ADR-019 Implementation Summary
+# ADR-025 Implementation Summary
 
 **Quick Reference for Developer**
 **Date**: 2025-11-19
@@ -12,8 +12,8 @@ This is a **critical bug fix** that implements IndieAuth authentication correctl
 
 All documentation has been separated into proper categories:
 
-### 1. **Architecture Decision Record** (ADR-019)
-**File**: `/home/phil/Projects/starpunk/docs/decisions/ADR-019-indieauth-pkce-authentication.md`
+### 1. **Architecture Decision Record** (ADR-025)
+**File**: `/home/phil/Projects/starpunk/docs/decisions/ADR-025-indieauth-pkce-authentication.md`
 
 **What it contains**:
 - Context: Why we need this change
@@ -39,7 +39,7 @@ All documentation has been separated into proper categories:
 This is your **primary implementation reference**.
 
 ### 3. **Versioning Guidance**
-**File**: `/home/phil/Projects/starpunk/docs/reports/ADR-019-versioning-guidance.md`
+**File**: `/home/phil/Projects/starpunk/docs/reports/ADR-025-versioning-guidance.md`
 
 **What it contains**:
 - Version number decision: **0.8.0**
@@ -53,7 +53,7 @@ This is your **primary implementation reference**.
 Follow the design document for detailed steps. This is just a high-level checklist:
 
 ### Pre-Implementation
-- [ ] Read ADR-019 (architectural decision)
+- [ ] Read ADR-025 (architectural decision)
 - [ ] Read full design document
 - [ ] Review versioning guidance
 - [ ] Understand PKCE flow
@@ -91,8 +91,8 @@ Follow the design document for detailed steps. This is just a high-level checkli
 - [ ] **Do NOT delete v0.7.0 or v0.7.1 tags**
 
 ### Documentation
-- [ ] Update ADR-016 status to "Superseded by ADR-019"
-- [ ] Update ADR-017 status to "Superseded by ADR-019"
+- [ ] Update ADR-016 status to "Superseded by ADR-025"
+- [ ] Update ADR-017 status to "Superseded by ADR-025"
 - [ ] Add implementation note to ADR-005
 
 ## Key Points
@@ -123,9 +123,9 @@ Follow the design document for detailed steps. This is just a high-level checkli
 
 **Read in this order**:
 1. This file (you are here) - Overview
-2. `/home/phil/Projects/starpunk/docs/decisions/ADR-019-indieauth-pkce-authentication.md` - Architectural decision
+2. `/home/phil/Projects/starpunk/docs/decisions/ADR-025-indieauth-pkce-authentication.md` - Architectural decision
 3. `/home/phil/Projects/starpunk/docs/designs/indieauth-pkce-authentication.md` - **Full implementation guide**
-4. `/home/phil/Projects/starpunk/docs/reports/ADR-019-versioning-guidance.md` - Versioning details
+4. `/home/phil/Projects/starpunk/docs/reports/ADR-025-versioning-guidance.md` - Versioning details
 
 **Standards Reference**:
 - `/home/phil/Projects/starpunk/docs/standards/versioning-strategy.md` - Semantic versioning rules
@@ -176,8 +176,8 @@ You're done when:
 **If authentication still fails**:
 1. Check logs for PKCE parameters (should be redacted but visible)
 2. Verify database has code_verifier column
-3. Check authorization URL has `code_challenge` and `code_challenge_method=S256`
-4. Verify token exchange POST includes `code_verifier`
+3. Check authorization URL has code_challenge and code_challenge_method=S256
+4. Verify token exchange POST includes code_verifier
 5. Check IndieLogin.com response in logs
 
 **Key debugging points**:
@@ -192,7 +192,7 @@ You're done when:
 
 Refer to:
 - Design document for "how"
-- ADR-019 for "why"
+- ADR-025 for "why"
 - Versioning guidance for "what version"
 
 All documentation follows the project principle: **Every line must justify its existence.**

docs/standards/testing-checklist.md

@@ -0,0 +1,127 @@
+# Testing Checklist
+
+This document provides a comprehensive checklist for testing StarPunk functionality before release.
+
+## Manual Testing Checklist
+
+### Core Functionality
+- [ ] Create notes via web interface
+- [ ] Create notes via Micropub JSON
+- [ ] Create notes via Micropub form-encoded
+- [ ] Notes display with proper microformats
+- [ ] Markdown renders correctly
+- [ ] Slugs generate uniquely
+- [ ] Timestamps record accurately
+
+### Authentication & Security
+- [ ] IndieAuth login flow works
+- [ ] Micropub client authentication
+- [ ] Token expiration works
+- [ ] Rate limiting functions
+
+### Syndication & Standards
+- [ ] RSS feed validates (W3C validator)
+- [ ] API returns correct status codes
+
+### Automated Testing
+- [ ] All unit tests pass
+- [ ] All integration tests pass
+- [ ] Test coverage >80%
+
+## Validation Tools
+
+### IndieWeb Standards
+- **IndieWebify.me**: https://indiewebify.me/
+  - Verify microformats (h-entry, h-card, h-feed)
+  - Check IndieAuth implementation
+
+- **IndieAuth Validator**: https://indieauth.com/validate
+  - Test IndieAuth flow
+  - Validate token handling
+
+- **Micropub Test Suite**: https://micropub.rocks/
+  - Comprehensive Micropub endpoint testing
+  - Verify spec compliance
+
+### Web Standards
+- **W3C Feed Validator**: https://validator.w3.org/feed/
+  - Validate RSS 2.0 feed structure
+  - Check date formatting
+  - Verify CDATA wrapping
+
+- **W3C HTML Validator**: https://validator.w3.org/
+  - Validate HTML5 markup
+  - Check semantic structure
+  - Verify accessibility
+
+- **JSON Validator**: https://jsonlint.com/
+  - Validate API responses
+  - Check Micropub payloads
+
+## Testing Resources
+
+### Specifications
+- IndieWeb Notes: https://indieweb.org/note
+- Micropub Spec: https://micropub.spec.indieweb.org
+- IndieAuth Spec: https://indieauth.spec.indieweb.org
+- Microformats2: http://microformats.org/wiki/h-entry
+- RSS 2.0 Spec: https://www.rssboard.org/rss-specification
+
+### Testing & Validation
+- Micropub Test Suite: https://micropub.rocks/
+- IndieAuth Testing: https://indieauth.com/
+- Microformats Parser: https://pin13.net/mf2/
+
+### Example Implementations
+- IndieWeb Examples: https://indieweb.org/examples
+- Micropub Clients: https://indieweb.org/Micropub/Clients
+
+## Pre-Release Validation Workflow
+
+1. **Run Automated Tests**
+   ```bash
+   uv run pytest
+   ```
+
+2. **Validate HTML**
+   - Test homepage output
+   - Test note permalink output
+   - Run through W3C HTML Validator
+
+3. **Validate RSS Feed**
+   - Access /feed.xml
+   - Run through W3C Feed Validator
+   - Verify in actual RSS reader
+
+4. **Validate Microformats**
+   - Test homepage with IndieWebify.me
+   - Test note permalinks
+   - Use microformats parser
+
+5. **Validate Micropub**
+   - Run micropub.rocks test suite
+   - Test with real Micropub client (Quill)
+
+6. **Manual Browser Testing**
+   - Chrome/Chromium
+   - Firefox
+   - Safari (if available)
+   - Mobile browsers
+
+7. **Security Verification**
+   - CSRF protection working
+   - XSS prevention verified
+   - SQL injection tests pass
+   - Path traversal prevention works
+
+## Success Criteria
+
+All checklist items must pass before V1 release. If any validation tool reports errors, they must be fixed before proceeding.
+
+## Related Documentation
+
+- [Testing Strategy](/home/phil/Projects/starpunk/docs/architecture/overview.md#testing-strategy)
+- [Implementation Plan](/home/phil/Projects/starpunk/docs/projectplan/v1/implementation-plan.md)
+- [Feature Scope](/home/phil/Projects/starpunk/docs/projectplan/v1/feature-scope.md)
+
+**Last Updated**: 2025-11-24

starpunk/__init__.py

@@ -153,5 +153,5 @@ def create_app(config=None):
 
 # Package version (Semantic Versioning 2.0.0)
 # See docs/standards/versioning-strategy.md for details
-__version__ = "0.9.2"
-__version_info__ = (0, 9, 2)
+__version__ = "0.9.5"
+__version_info__ = (0, 9, 5)

starpunk/auth.py

@@ -407,7 +407,11 @@ def handle_callback(code: str, state: str, iss: Optional[str] = None) -> Optiona
 
     current_app.logger.debug(f"Auth: Issuer verified: {iss}")
 
-    # Prepare token exchange request with PKCE verifier
+    # Prepare code verification request with PKCE verifier
+    # Note: For authentication-only flows (identity verification), we use the
+    # authorization endpoint, not the token endpoint. grant_type is not needed.
+    # See IndieAuth spec: authorization endpoint for authentication,
+    # token endpoint for access tokens.
     token_exchange_data = {
         "code": code,
         "client_id": current_app.config["SITE_URL"],
@@ -415,7 +419,8 @@ def handle_callback(code: str, state: str, iss: Optional[str] = None) -> Optiona
         "code_verifier": code_verifier,  # PKCE verification
     }
 
-    token_url = f"{current_app.config['INDIELOGIN_URL']}/token"
+    # Use authorization endpoint for authentication-only flow (identity verification)
+    token_url = f"{current_app.config['INDIELOGIN_URL']}/authorize"
 
     # Log the request (code_verifier will be redacted)
     _log_http_request(
@@ -426,7 +431,7 @@ def handle_callback(code: str, state: str, iss: Optional[str] = None) -> Optiona
 
     # Log detailed httpx request info for debugging
     current_app.logger.debug(
-        "Auth: Sending token exchange request:\n"
+        "Auth: Sending code verification request to authorization endpoint:\n"
         "  Method: POST\n"
         "  URL: %s\n"
         "  Data: code=%s, client_id=%s, redirect_uri=%s, code_verifier=%s",
@@ -437,7 +442,7 @@ def handle_callback(code: str, state: str, iss: Optional[str] = None) -> Optiona
         _redact_token(code_verifier),
     )
 
-    # Exchange code for identity (CORRECT ENDPOINT: /token)
+    # Exchange code for identity at authorization endpoint (authentication-only flow)
     try:
         response = httpx.post(
             token_url,
@@ -447,7 +452,7 @@ def handle_callback(code: str, state: str, iss: Optional[str] = None) -> Optiona
 
         # Log detailed httpx response info for debugging
         current_app.logger.debug(
-            "Auth: Received token exchange response:\n"
+            "Auth: Received code verification response:\n"
             "  Status: %d\n"
             "  Headers: %s\n"
             "  Body: %s",

starpunk/config.py

@@ -44,9 +44,9 @@ def load_config(app, config_override=None):
         )
 
     # Flask secret key (uses SESSION_SECRET by default)
-    app.config["SECRET_KEY"] = os.getenv(
-        "FLASK_SECRET_KEY", app.config["SESSION_SECRET"]
-    )
+    # Note: We check for truthy value to handle empty string in .env
+    flask_secret = os.getenv("FLASK_SECRET_KEY")
+    app.config["SECRET_KEY"] = flask_secret if flask_secret else app.config["SESSION_SECRET"]
 
     # Data paths
     app.config["DATA_PATH"] = Path(os.getenv("DATA_PATH", "./data"))