PoseCap: Skill for Codex

.agents/skills/ad-bootstrap/SKILL.md

ad-bootstrap is a skill for Codex from CorridorTech/PoseCap. It costs 74 tokens per session (2,261 once invoked), scanned A, original, Apache-2.0.

A command for creating or auditing AGENTS.md, the repository guide that tells coding assistants how to work in that codebase.

In plain words
What is it for?
Use it to scan a project and generate AGENTS.md, or to audit an existing AGENTS.md without rewriting it.
Why use it?
It turns observed repository practices into operational instructions and highlights missing or outdated guidance.

Skill for Codex

Written for Codex: agents/openai.yaml present. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions subagents.

This is CorridorTech/PoseCap's own configuration. It tells Codex how to work on PoseCap itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything PoseCap configures →

Reuse

Borrowing it

Nothing to install: this file belongs to CorridorTech/PoseCap. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/CorridorTech/PoseCap/main/.agents/skills/ad-bootstrap/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/CorridorTech/PoseCap

Made for: Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for ad-bootstrap

README.md
[![agentmods](https://agentmods.dev/badge/skills/corridortech/posecap/ad-bootstrap/github.svg)](https://agentmods.dev/skills/corridortech/posecap/ad-bootstrap)
Your own site
<a href="https://agentmods.dev/skills/corridortech/posecap/ad-bootstrap"><img src="https://agentmods.dev/badge/skills/corridortech/posecap/ad-bootstrap/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for ad-bootstrap

Your own site · 80×15
<a href="https://agentmods.dev/skills/corridortech/posecap/ad-bootstrap"><img src="https://agentmods.dev/badge/skills/corridortech/posecap/ad-bootstrap.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 74 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,261 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Privilege Escalation · line 161
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00074 $0.02261
Opus 5.5 $0.00030 $0.00904
Sonnet 5.5 $0.00015 $0.00452
Haiku 4.5 $0.00007 $0.00226

Measured 2mo ago against content hash 3c90471074dc, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ad-bootstrap scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.agents/skills/ad-bootstrap/SKILL.md · 191 lines

How it starts

The opening of the file, as written. The whole thing — 191 lines — stays where its author put it; the contents beside it link to each section on GitHub.

<background_information> Produces AGENTS.md at the repo root, ≤150 lines, every line operational. Generic agent behavior (think-before-coding, verify-before-claiming-done, etc.) does NOT belong here — that lives in the ad-philosophy skill.

Three modes, detected from filesystem state:

  • AGENTS.md exists at the repo root → audit (do not rewrite, output drift list only)
  • AGENTS.md absent and only trivial files present (.git, node_modules, .gitignore, .gitattributes, .DS_Store, .env*, .idea, .vscode, LICENSE*, README.md) → greenfield (interview by placeholder, no scan)
  • AGENTS.md absent and meaningful code present → brownfield (scan first, pre-fill, ask only gaps) </background_information>

Step 1 — scan (brownfield only). Read in this order, taking the first that exists for each category:

  • Manifests: package.json, pyproject.toml, Cargo.toml, go.mod, Gemfile, composer.json, pubspec.yaml.
  • README.md, plus any doc/ or docs/ directory.
  • Top-level directory listing.
  • doc/adr/ — binding decisions; read every ADR.
  • GUIDELINES.md at repo root — if present, the AGENTS.md sections that have a corresponding GUIDELINES.md section (Code Style → §2; Quality Gates → §8; Commit & PR → §10; Security & Privacy → §12) emit as pointer stubs instead of inline rules' ' reciprocity and ADR-0030 §1.
  • .claude/, .cursor/, .openai/, .agents/ — existing agent config.
  • Hook configs: .husky/, .pre-commit-config.yaml, .github/workflows/, .gitlab-ci.yml, .circleci/.
  • Lockfiles: package-lock.json, yarn.lock, pnpm-lock.yaml, poetry.lock, Cargo.lock.
  • git remote -v for the repo URL.

Build a model of: stack (languages and versions), entry points, build / test / lint commands, conventions, quality gates, security boundaries, gotchas confirmed by code.

Step 2 — pre-fill. For every <placeholder> in the template, fill from observed signals. No fabrication. If a section has no signal, write <TODO: not yet wired> in one line and move on. Do not write meta-prose explaining the gap.

Step 3 — show only the gaps. Print to the user:

  • (a) placeholders that could not be filled from repo signals;
  • (b) signals that conflict (two test commands, two style configs, README contradicts code, etc.).

One question per gap. Skip everything filled confidently. Do NOT ask philosophical questions ("is this doc for agents or humans?", "what is the most important quality bar?") — those are decisions, not interview material.

Step 4 — write the file. On user confirmation, write AGENTS.md at the repo root. Cut every line that does not change agent behavior. No "External Resources" section (URLs are derivable from git remote and the manifest). No appended Universal Agent Behavior block. No marketing prose.

Audit-mode override: do NOT write the file. Produce a drift list. Format each line as: [file or section]: spec says X, code says Y. Suggested resolution: change spec / change code / discuss.

If something the user says contradicts what the code shows, surface the conflict. Don't silently trust the user; don't silently trust the code.

Read the full file on GitHub · 191 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2mo ago First seen · 191 lines · 74 tokens per session scan A 3c90471074dc

Subscribe to this mod's changes

ad-bootstrap is a skill published in the GitHub repository CorridorTech/PoseCap (265 stars, last pushed 3d ago), licensed Apache-2.0. It adds 74 tokens to every session and 2,261 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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