---
phase: 09-navigation-structure
plan: "02"
subsystem: docs
tags: [llmstxt, mkdocs, agent-accessibility, docs-site]

# Dependency graph
requires:
  - phase: 08-mkdocs-infrastructure
    provides: MkDocs site with docs/ directory, mkdocs.yml nav structure
  - phase: 09-navigation-structure plan-01
    provides: guide/index.md and dev/index.md section landing pages
provides:
  - docs/llms.txt following llmstxt.org spec (H1, blockquote, H2 sections, absolute URLs)
  - docs/llms-full.txt concatenated full corpus of all 15 docs pages
  - scripts/gen_llms_full_txt.py stdlib-only generation script
affects: [10-content-writing, 11-final-polish, any agent workflows using docs corpus]

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "llmstxt.org spec: H1 project name, blank line, blockquote summary, H2 sections with markdown link lists"
    - "gen_llms_full_txt.py: NAV_ORDER-driven concatenation with strip_frontmatter() and section headers"

key-files:
  created:
    - docs/llms.txt
    - docs/llms-full.txt
    - scripts/gen_llms_full_txt.py
  modified: []

key-decisions:
  - "llms.txt hand-authored (not generated) — spec is stable and the file is small enough to maintain manually"
  - "llms-full.txt generated by script so NAV_ORDER can be kept in sync with mkdocs.yml nav changes"
  - "Both .txt files auto-served by MkDocs as static assets (no plugin needed)"
  - "strip_frontmatter() removes YAML --- blocks before concatenation to avoid polluting the corpus"

patterns-established:
  - "NAV_ORDER in gen_llms_full_txt.py must stay in sync with mkdocs.yml nav: — comment enforces this"
  - "Script uses WARNING (not error) for missing files — allows partial generation during parallel plan execution"

requirements-completed:
  - AGNT-01
  - AGNT-02

# Metrics
duration: 2min
completed: "2026-03-20"
---

# Phase 09 Plan 02: Agent Accessibility Files Summary

**llmstxt.org-spec docs/llms.txt and stdlib-generated docs/llms-full.txt (1475 lines, 15 pages) for single-context AI agent corpus loading**

## Performance

- **Duration:** 2 min
- **Started:** 2026-03-20T17:45:28Z
- **Completed:** 2026-03-20T17:47:09Z
- **Tasks:** 2
- **Files modified:** 3

## Accomplishments

- docs/llms.txt: hand-authored per llmstxt.org spec with H1, two-line blockquote, three H2 sections, 15 absolute trailing-slash URLs pointing to thatdevstudio.github.io/ztlctl/
- scripts/gen_llms_full_txt.py: stdlib-only (pathlib) script with NAV_ORDER matching locked mkdocs.yml nav, strip_frontmatter(), and missing-file warnings
- docs/llms-full.txt: 1475-line concatenated corpus from all 15 docs pages (including guide/index.md and dev/index.md from plan 09-01) with section headers
- mkdocs build --strict passes; both site/llms.txt and site/llms-full.txt confirmed present in build output

## Task Commits

Each task was committed atomically:

1. **Task 1: Author docs/llms.txt per llmstxt.org spec** - `bf5dac1` (docs)
2. **Task 2: Write gen_llms_full_txt.py and generate docs/llms-full.txt** - `2adc101` (docs)

**Plan metadata:** (created next)

## Files Created/Modified

- `docs/llms.txt` - Agent-readable docs index per llmstxt.org spec: H1, blockquote summary, three H2 sections with 15 absolute URLs
- `docs/llms-full.txt` - Concatenated full corpus of all 15 docs pages in nav order with section headers (1475 lines)
- `scripts/gen_llms_full_txt.py` - Generation script: NAV_ORDER-driven, strip_frontmatter(), stdlib-only

## Decisions Made

- llms.txt is hand-authored (not generated) because the spec structure is stable and the file is small; script would add complexity without benefit
- gen_llms_full_txt.py uses NAV_ORDER (not mkdocs.yml parsing) to avoid a PyYAML dependency and keep the script stdlib-only
- Both files are auto-served as MkDocs static assets — no additional plugin or hook configuration needed
- strip_frontmatter() silently strips --- blocks before concatenating so YAML metadata never pollutes the agent corpus

## Deviations from Plan

None - plan executed exactly as written.

Pre-commit hooks auto-fixed minor formatting issues (end-of-file newline, removed unused `re` import, ruff format) during commits — these are standard hook behavior, not deviations from plan intent.

## Issues Encountered

None. Both guide/ and dev/ subdirectory landing pages from plan 09-01 were already present, so the script generated the full 15-page corpus without any WARNING lines.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- Both agent accessibility files are live-served at site/llms.txt and site/llms-full.txt
- Phase 09 is complete (plan 01: nav restructure + section landings, plan 02: agent accessibility files)
- Phase 10 and Phase 11 can proceed in parallel (both depend on Phase 09, not each other)

---
*Phase: 09-navigation-structure*
*Completed: 2026-03-20*
