Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add jamesyang124/agent-skills --skill sync-api-specgit clone --depth 1 https://github.com/jamesyang124/agent-skillsWrote 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.
[](https://agentmods.dev/skills/jamesyang124/agent-skills/sync-api-spec)<a href="https://agentmods.dev/skills/jamesyang124/agent-skills/sync-api-spec"><img src="https://agentmods.dev/badge/skills/jamesyang124/agent-skills/sync-api-spec/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.
<a href="https://agentmods.dev/skills/jamesyang124/agent-skills/sync-api-spec"><img src="https://agentmods.dev/badge/skills/jamesyang124/agent-skills/sync-api-spec.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00000 | $0.03304 |
| Opus 5.5 | $0.00000 | $0.01322 |
| Sonnet 5.5 | $0.00000 | $0.00661 |
| Haiku 4.5 | $0.00000 | $0.00330 |
Grade A, and why
sync-api-spec 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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 260 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Sync API Spec
Install this skill globally
Install once — available in all projects.
# Claude
mkdir -p ~/.claude/skills/sync-api-spec
cp <agent-settings-repo>/.agent-settings/skills/tools/sync-api-spec/SKILL.md \
~/.claude/skills/sync-api-spec/SKILL.md
# Add to ~/.claude/CLAUDE.md: - **sync-api-spec** (`~/.claude/skills/sync-api-spec/SKILL.md`)
# Copilot
mkdir -p ~/.copilot/skills/sync-api-spec
cp <agent-settings-repo>/.agent-settings/skills/tools/sync-api-spec/SKILL.md \
~/.copilot/skills/sync-api-spec/SKILL.md
This skill maintains docs/agents/api-spec.md — a compact, machine-readable API reference for the consuming project. It scans the router for all routes, diffs against the existing spec file to find new or changed routes, re-scans only those handlers, and writes an updated file. An optional Confluence publish step is offered after the local file is written.
Arguments
All optional.
| Token | Meaning |
|---|---|
one or more route paths (e.g. /v1/users) |
restrict the scan to those routes; default is a full sync of every route |
Contract mode is not an argument — it is asked in step 0b of the process below.
Output File
Target: docs/agents/api-spec.md (relative to the consuming project root, not this repo).
Format is defined in references/api-spec-format.md.
Process
- Load project configuration: Read
.agent-settings/project-config.md.- If the file is missing: tell the user to run
setup-project-configfirst ("set up project config"), then stop. - If the file uses the legacy schema (has a top-level
## Confluence/## Jirainstead of## MCP: atlassian): warn that it predates the per-MCP schema and tell the user to re-runsetup-project-configto migrate — otherwise the Confluence publish step below cannot find the space/parent config. - Use framework, router file path, handler directory, DTO/model directory, and service directory from config throughout.
- If the file is missing: tell the user to run
0b. Contract mode check:
Ask the user:
Generate in contract mode? (y/n)
- Blank input: re-prompt — must type y or n.
- Contract mode (y): the spec describes a planned / agreed-upon API that has not been implemented yet.
The agent documents based on user-provided descriptions, not scanned code.
Set CONTRACT_MODE=true. Skip steps 2–4 (no router scan, no handler scan).
- Normal mode (n): scan existing code as usual. Set CONTRACT_MODE=false.
What ships with it
4 files 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.
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.
- 1mo ago First seen · 260 lines · 0 tokens per session scan A 3594b0107ca8
sync-api-spec is a skill published in the GitHub repository jamesyang124/agent-skills (2 stars, last pushed 7d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 3,304 tokens. 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 2026-08-31.
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