maintain-project-constraints

name	maintain-project-constraints
description	Reads the latest codebase and docs to update CLAUDE.md and AGENTS.md at both the project root and per sub-module (crate, package, etc.). CLAUDE.md targets Claude Code; AGENTS.md targets non-Claude agents (Codex, etc.).

Goal

Maintain project constraint files at both root and sub-module levels so that every agent modifying any part of the codebase has clear boundaries to follow.

Deliverables:

• Root-level CLAUDE.md + AGENTS.md (three-section format: Commands / Business Goals / Documentation Index)
• Per-module CLAUDE.md + AGENTS.md (description / file list / non-violable rules)

Acceptance Criteria

• Root CLAUDE.md and AGENTS.md updated and consistent with actual code
• Prohibitions extracted from git history, issues, and CI config
• Every discovered sub-module has its own constraint files
• All generated files accurately reflect the current codebase state

Workflow

1. Explore the Codebase

Read the repository to understand:

• Project structure and how modules are organised
• Build system and package managers in use
• Existing documentation and development conventions
• CI config, git history, and issue patterns

2. Extract Prohibitions

Look across the project for implicit and explicit prohibitions. Concrete sources:

• Recurring revert / fix commits in git log
• Infeasible approaches mentioned in past issues
• Operations explicitly banned in CI config
• Technical limitations annotated in project docs

Each prohibition must be specific and actionable (e.g. "never auto-create database migrations" not "handle databases carefully"). Include them in root-level AGENTS.md and CLAUDE.md under a Prohibitions section.

3. Discover Sub-modules

Identify every sub-module that needs its own constraint files. A directory qualifies if EITHER:

1. Has a package manifest: the directory contains Cargo.toml, package.json, pyproject.toml, go.mod, pom.xml, build.gradle, etc.
2. Lives in a well-known group directory: resides under packages/, crates/, apps/, lib/, modules/, components/ AND has a clear boundary (own entry point, README, or standalone deployment unit)

For each sub-module record: relative path and a brief description (extract from the manifest's description field or README; infer from code if neither exists).

4. Write Root-level Files

Create or update CLAUDE.md and AGENTS.md in the project root using assets/templates/root-AGENTS.md and assets/templates/root-CLAUDE.md as format skeletons. Both use exactly three sections in this order:

1. Common Development Commands — only include commands verifiable against real entry points (package.json, Makefile, scripts, CI config). Before using any apltk command, run its --help first. Append a one-line purpose per command.
2. Project Business Goals — project-level purpose and value, not a feature list.
3. Project Documentation Index — cover all files under docs/features/, docs/architecture/, docs/principles/, plus important root files (README.md, etc.). Also include each sub-module's constraint file: <module_name>/CLAUDE.md in CLAUDE.md, <module_name>/AGENTS.md in AGENTS.md — each with a one-line description.

AGENTS.md vs CLAUDE.md split:

Aspect	AGENTS.md	CLAUDE.md
Audience	Non-Claude agents (Codex, etc.)	Claude Code
Syntax	Agent-neutral, no platform-specific syntax	May use Claude-specific syntax
Claude-only content	Must not include	May include hooks, scheduled tasks, cowork, MCP
Common base	Three sections + Prohibitions	Same as AGENTS.md

Both files must stay under 100 lines. Prioritise brevity over completeness when constrained.

5. Write Per-module Files

For each sub-module discovered in Step 3, create or update CLAUDE.md and AGENTS.md in its directory using assets/templates/module-CLAUDE.md as the format skeleton.

Key points:

• Module-level CLAUDE.md and AGENTS.md have identical content — the format is simple and carries no platform-specific information
• MODULE FILE LIST covers all source files; exclude generated output, dist, node_modules, target, etc.
• RULES SHOULD NOT BE VIOLATED derives from: module boundary rules, dependency direction, internal conventions, and historical error patterns
• If files already exist, verify their accuracy and update stale content — don't just append

Verification

Self-review before delivery:

• Every sub-module has both CLAUDE.md and AGENTS.md
• All sub-modules discovered in Step 3 are covered — none missed
• File lists match actual source files in each directory
• Every prohibition has supporting evidence (git commit hash, issue link, CI config line number, or doc excerpt)
• Every RULES SHOULD NOT BE VIOLATED entry can be traced back to code structure or project history — no invented rules
• Documentation Index contains no dead links
• Root-level Documentation Index references every sub-module's constraint file

References

• assets/templates/root-AGENTS.md — format skeleton for root-level AGENTS.md
• assets/templates/root-CLAUDE.md — format skeleton for root-level CLAUDE.md
• assets/templates/module-CLAUDE.md — format skeleton for per-module constraint files