ai-agents-config-catalog

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name: ai-agents-config-catalog
description: Catalog of every configuration axis in this repo, env vars, commit markers, frontmatter keys, QA skip verdicts, and escape hatches, each with its enforcement point and abuse story, plus the checklist for adding a new flag safely. Use when you say `what does a skip flag do`, `list escape hatches`, `can I skip this gate`, `add a config flag`. Do NOT use for hook runtime behavior (use `agent-harness-reference`) or change gating policy (use `ai-agents-change-control`).
version: 1.0.0
license: MIT
metadata:
  routing:
    role: conditional-adjunct
    invoker: ai-agents-debugging-playbook
    trigger: ai-agents-debugging-playbook points here for the full catalog of env vars, markers, and escape hatches
    user-facing: false

---
name: ai-agents-config-catalog
description: Catalog of every configuration axis in this repo, env vars, commit markers, frontmatter keys, QA skip verdicts, and escape hatches, each with its enforcement point and abuse story, plus the checklist for adding a new flag safely. Use when you say `what does a skip flag do`, `list escape hatches`, `can I skip this gate`, `add a config flag`. Do NOT use for hook runtime behavior (use `agent-harness-reference`) or change gating policy (use `ai-agents-change-control`).
version: 1.0.0
license: MIT
metadata:
  routing:
    role: conditional-adjunct
    invoker: ai-agents-debugging-playbook
    trigger: ai-agents-debugging-playbook points here for the full catalog of env vars, markers, and escape hatches
    user-facing: false
---

# AI Agents Config Catalog

<!-- vendor-portability: contributor-facing knowledge pack for the rjmurillo/ai-agents repo itself; intentionally references upstream paths (.agents/, .claude/, scripts/, build/, build/scripts/build_all.py, scripts/validation/check_push_lock_before_commit.py, scripts/validation/git_hook_policy.py) because its audience is repo contributors, not plugin consumers (issue #2050) -->
Every flag, marker, and skip semantic in this repo, verified against code as
of 2026-07-03. Hook registration surfaces were rechecked on 2026-09-01. Each
escape hatch exists because a gate sometimes misfires; each one also has an
abuse story or a guard. Before you set any of these, read its row. The house
rule (learned in session 1187, see the Removed Flags section): escape hatches
get teeth or get abused.

Related skills: `ai-agents-change-control` owns when a bypass is allowed; `agent-harness-reference` and `ai-agents-architecture-contract` own what the hooks themselves do; `ai-agents-debugging-playbook` owns triaging a gate that fired on you.

## Triggers

- `what does the drift allowlist do`
- `list escape hatches`
- `can I skip this gate`
- `add a config flag`
- `is this skip marker allowed`

## Process

1. Identify the axis type: env var, commit marker, text directive, frontmatter key, file, or verdict string.
2. Find its row in the tables below. Read the effect AND the guard/abuse column before using it.
3. If you are about to use an escape hatch, confirm the legitimate trigger condition holds (for example, a workflow actually unrunnable under act). Bypassing because a gate is slow or annoying is the session 1187 failure mode.
4. Re-verify the flag in its defining validator with the one-liner in Provenance. Documentation can drift after validator changes.
5. Adding a new flag? Follow the checklist in "How to Add a New Flag" and add a row plus a re-verify one-liner to this catalog.

## Environment Variables: LSP Gate (retired)

The LSP-first runtime gate and its three environment escapes (`SKIP_LSP_GATE`, `LSP_GATE_MODE`, `LSP_DOWN`) were retired in #3216 when ADR-062 was amended to keep LSP-first navigation as static steering only. No environment variable governs it now; the guidance lives in `.claude/rules/lsp-first.md`. Nothing to set, nothing to escape.

## Git Hook Configuration

Lefthook is the sole Git hook manager. `lefthook.yml` declares the events,
filters, named jobs, and validator commands. Do not infer a bypass from a
deleted custom payload. Inspect the named validator's current interface before
using or documenting an environment variable.

## Removed and Stale Flags (do not use, do not reintroduce)

| Name | Status as of 2026-07-03 | Story |
|---|---|---|
| `SKIP_PREPUSH` | REMOVED | Historical: abused 3x within hours of creation (session 1187, retro `.project-toolkit/retrospective/2026-02-08-session-1187-skip-prepush-abuse.md`) |
| `SKIP_TESTS` | REMOVED | Removed from the pre-push hook during the Lefthook migration, but it outlived that as the env default for `pre_pr.py --skip-tests`, which was parsed and never read; flag, env default, and the `--verbose` beside it were deleted once no gate set `skip_flag` |

Lesson encoded: a global bypass with no teeth (no telemetry, no approval step) will be reached for under pressure. New escape hatches must be narrow, announced in output, and observable.

## Environment Variables: Tests and Tooling

| Name | Type | Effect | Status | Guard / abuse story | Where defined |
|---|---|---|---|---|---|
| `GIT_CONFIG_COUNT` + `GIT_CONFIG_KEY_0`/`GIT_CONFIG_VALUE_0` | env vars (set by conftest) | Test session injects `commit.gpgsign=false` with command-line precedence so test repos never invoke the user's signing setup | Production test infra | Only sets index 0 when `GIT_CONFIG_COUNT` is unset, so an outer process's config is not clobbered | `tests/conftest.py:76-78` |
| `SERENA_PROJECT_ROOT` | env var (user-set) | Formerly overrode automatic Serena project root detection in the worktree scope guard. Set to the absolute path of the intended worktree when switching projects | Retired hook (ADR-097) | Was validated: path had to contain `.serena/project.yml` or the override was ignored; blocked writes when unset and `CLAUDE_PROJECT_DIR` was absent. `invoke_serena_worktree_scope_guard.py` is deleted, so nothing reads this variable today | historical: `.claude/hooks/PreToolUse/invoke_serena_worktree_scope_guard.py` (path no longer exists) |
| PEP 668 / uv | environment reality | Bare `pip` fails (externally managed env). Everything goes through `uv sync --frozen --extra dev`; skill scripts need `uv run python`, not `python3` (PyYAML lives in the venv) | Production | `ModuleNotFoundError: No module named 'yaml'` means you used the wrong interpreter | `pyproject.toml`, `.python-version` (3.14.6) |
| pytest markers `unit`, `integration`, `safe_push_transport`, `security`, `smoke`, `claude`, `copilot`, `codex`, `windows_path` | pytest -m selectors | Filter test classes; `smoke` = real-CLI tests needing auth/credits or an installed CLI, run on pull requests by `plugin-cli-smoke.yml`, and the smoke gate asserts they were NOT skipped (issue #2231 item 4); `safe_push_transport` = touches a non-local transport, excluded from pre-push; `claude` / `copilot` / `codex` = the CLI a real-CLI test needs, so each CLI smoke leg selects `smoke and <cli>` | Production | Marking a test `smoke` to dodge CI is detected by the not-skipped assertion | `pyproject.toml [tool.pytest.ini_options].markers` |
| `SKIP_PUSH_LOCK_COMMIT_GUARD` | env var (`=1` exact match) | Bypasses the `push-lock-commit-guard` pre-commit job (issue #5123), which otherwise refuses a commit while a push for the current branch name holds the canonical push-lock file | Production escape hatch | Scoped to one check, not global. Prints `push-lock: commit guard bypassed via SKIP_PUSH_LOCK_COMMIT_GUARD=1` so the bypass is visible in commit output; any other value (`0`, `true`, unset) leaves the guard enforced | `scripts/validation/check_push_lock_before_commit.py:71,177-180`; wired as `push-lock-commit-guard` in `lefthook.yml` |
| `AI_AGENTS_PYTEST_FULL_SUITE_LOCALLY` | env var (`1` or unset; blank counts as unset) | Controls what `python-tests` runs pre-push. Unset: the import graph narrows the diff, and where it cannot, the fallback collects instead of executing, so a broken import and a syntax error still block the push and everything else is CI's. `1`: import-graph selection is skipped entirely and every partition executes locally, announced on stderr. Any other value raises rather than quietly doing less | Production opt-in | Scoped to one job, not a bypass: it makes the gate stricter, never weaker, so there is no abuse direction. Validated before a path is chosen, so `true` is reported whichever way selection would have gone, and the valid value acts on both paths rather than only on the fallback | `scripts/validation/git_hook_policy.py`, constant `PYTEST_FULL_SUITE_LOCALLY_ENV` (name), `_validated_full_suite_opt_in` and the short-circuit in `_resolve_pytest_commands` (semantics). Cited by symbol: two earlier line numbers here went stale within a day |
| `AI_AGENTS_PYTEST_WORKERS` | env var (positive integer or `auto`; blank counts as unset) | Overrides the xdist worker count pre-push pytest runs with. Unset or blank: the policy picks the count. Any other value it cannot parse raises rather than falling back to a default the caller did not ask for | Production | Same fail-loud contract as the flag above and validated at the same point, after a version that checked it only inside the executing partitions let an invalid value pass unreported on the collection path | `scripts/validation/git_hook_policy.py`, constant `PYTEST_WORKERS_ENV` (name), `_pytest_parallel_flags` (semantics) |

## .env Keys (from .env.example)

Copy `.env.example` to `.env`. Keys as of 2026-07-03: `ANTHROPIC_API_KEY` (MCP servers, skill-learning hook LLM fallback, exact token counts), `PERPLEXITY_API_KEY`, `TAVILY_API_KEY`, `CONTEXT7_API_KEY`, `YDC_API_KEY`, and optional `COMPRESS_TOKENIZER` (tiktoken/anthropic/heuristic, default tiktoken). Everything degrades gracefully when absent per ADR-007; missing keys disable the corresponding MCP or fallback path, they do not break the repo. Note: `COMPRESS_TOKENIZER` appears only in `.env.example`; a code consumer was not located in this audit, treat as possibly vestigial.

## Commit Markers

| Name | Type | Effect | Status | Guard / abuse story | Where defined |
|---|---|---|---|---|---|
| `drift-allowlist.json` (governance directory) | committed allowlist file (replaces the retired commit-message marker, issue #5636) | Excuses named files from the agent drift gate. Each entry needs an exact repo-relative `path` and a non-empty `reason`; globs, absolute paths, dot-dot segments, duplicates, and unknown keys are rejected (exit 2). Every other drift still fails | Reviewed exception, visible in the PR diff | `generate_agents.py --validate` prints each allowed divergence with its reason and warns on an entry that matched no drift. CODEOWNERS requires the owner on the allowlist file, its loader, and the generator. No commit message skips the drift job | `drift_allowlist.py`; the Intentional divergence section of CONTRIBUTING |

## Text Directives (orphan-ref-validator)

| Name | Type | Effect | Status | Guard / abuse story | Where defined |
|---|---|---|---|---|---|
| `orphan-ref-ignore` HTML comment | line directive | Mutes orphan-reference findings for that one line | Production | Rare in tree, easy to grep; compensating control is human review of any commit adding one (DESIGN-009) | `.claude/skills/orphan-ref-validator/scripts/patterns.py:63` |
| `orphan-ref-ignore-file` HTML comment | file directive | Mutes the whole file, but ONLY if the directive appears within the first 50 lines | Production | The 50-line rule prevents burying the mute at the bottom of a long doc | `patterns.py:89`; 50-line window at `scan.py:234` |

Write the directives as HTML comments (`<!-- ... -->`); shown bare here so this catalog does not mute itself.

## Frontmatter Keys (skills)

| Name | Type | Effect | Status | Guard / abuse story | Where defined |
|---|---|---|---|---|---|
| `size-exception: true` | SKILL.md frontmatter | Exempts the file from the 500-line block in the size validator | Escape hatch, must be justified | `taste-lints` only honors it in the first 20 lines of the file; validator prints "size-exception declared" so reviewers see it | `scripts/validation/skill_size.py:734`; `.claude/skills/taste-lints/scripts/taste_lints.py` (the `lines[:20]` check) |
| `allowed-tools`, `argument-hint` | frontmatter keys | Harness metadata; not flagged as prose refs, since neither key name matches a candidate pattern the orphan-ref scanner tracks | Production | Candidate patterns live in one place | `.claude/skills/orphan-ref-validator/scripts/filters.py` |

## QA Skip Verdicts (ADR-034)

Session-end QA can be skipped only with one of these exact verdict strings in the session log, and only when the staged files qualify.

| Verdict | When legitimate | Enforcement |
|---|---|---|
| `SKIPPED: investigation-only` | Every