spec-compliance-auditor

spec-compliance-auditor is a skill for Claude Code from mathiasbourgoin/roster. It costs 21 tokens per session (1,319 once invoked), scanned A, original, MIT.

A skill that compares a software implementation with a specification file and reports missing requirements or behaviour that differs from the specification.

In plain words
What is it for?
Use it to audit code against kb/spec.md or another supplied specification, checking each concrete, testable requirement.
Why use it?
It helps reveal when code does not match what the project says it should do.

Skill for Claude Code

Written for Claude Code: when-to-use in frontmatter. Also seen: installed under .agents/ (shared by several agents).

Good fit Use it to audit code against kb/spec.md or another supplied specification, checking each concrete, testable requirement.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/mathiasbourgoin/roster/spec-compliance-auditor
Install

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.

Any agent
npx skills add mathiasbourgoin/roster --skill spec-compliance-auditor
Clone the repo
git clone --depth 1 https://github.com/mathiasbourgoin/roster

Made for: Claude Code.

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 spec-compliance-auditor

README.md
[![agentmods](https://agentmods.dev/badge/skills/mathiasbourgoin/roster/spec-compliance-auditor/github.svg)](https://agentmods.dev/skills/mathiasbourgoin/roster/spec-compliance-auditor)
Your own site
<a href="https://agentmods.dev/skills/mathiasbourgoin/roster/spec-compliance-auditor"><img src="https://agentmods.dev/badge/skills/mathiasbourgoin/roster/spec-compliance-auditor/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 spec-compliance-auditor

Your own site · 80×15
<a href="https://agentmods.dev/skills/mathiasbourgoin/roster/spec-compliance-auditor"><img src="https://agentmods.dev/badge/skills/mathiasbourgoin/roster/spec-compliance-auditor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,319 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.
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 $0.00021 $0.01319
Opus 5 $0.00010 $0.00660
Sonnet 5 $0.00004 $0.00264
Haiku 4.5 $0.00002 $0.00132

Measured 4d ago against content hash 883dc7fc0169, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

spec-compliance-auditor 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 4d 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/spec-compliance-auditor/SKILL.md · 130 lines

How it starts

The opening of the file, as written. The whole thing — 130 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Spec Compliance Auditor

Compare the implementation against a spec file to verify every specified behavior is implemented and every implemented behavior is specified.

Input Contract

  • If $ARGUMENTS contains a file path to a spec: use that file as the spec source
  • Default (no $ARGUMENTS): read kb/spec.md
  • Fail gracefully if neither exists: report "No spec source available" and exit

Steps

1. Extract Testable Claims

SPEC_PATH="${ARGUMENTS:-kb/spec.md}"
[ -f "$SPEC_PATH" ] || { echo "No spec at $SPEC_PATH — skipping"; exit 0; }
  • Read the spec file at $SPEC_PATH in full.
  • For a generated kb/spec.md, use each projected qualified identifier (<namespace>/FR-NNN, <namespace>/AC-N, <namespace>/CHECK-N) as the claim reference. Do not collapse it back to an unqualified local ID. Exclude the projection itself as evidence that the claim is implemented.
  • Extract every concrete, testable claim. A testable claim is a statement that can be verified by reading code or running a test. Examples:
    • "The API returns 404 when the resource is not found"
    • "Passwords are hashed with bcrypt, cost factor 12"
    • "The retry limit is 3 attempts with exponential backoff"
  • Ignore aspirational or process-oriented statements ("we aim to...", "the team will...").
  • For legacy prose without qualified identifiers, number each claim legacy:S1, legacy:S2, etc. The prefix makes the weaker extraction path visible in reports.

2. Verify Each Claim

For each testable claim:

  1. Locate the relevant implementation code (search for function names, types, constants mentioned in the claim).
  2. Read the code and determine if the behavior matches the spec.
  3. Check tests — does a test exist that verifies this specific claim? Note the test file and name.
  4. Classify:
Status Meaning
PASS Code matches spec, test exists
UNTESTED Code matches spec, no test covering it
DIVERGE Code behaves differently than spec states
MISSING No implementation found for this spec item

Read the full file on GitHub · 130 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. 4d ago Changed · +22 lines · -2 tokens per session 883dc7fc0169
  2. 11d ago First seen · 108 lines · 23 tokens per session scan A 5b4022922fa0

Subscribe to this mod's changes

spec-compliance-auditor is a skill published in the GitHub repository mathiasbourgoin/roster (2 stars, last pushed 5d ago), licensed MIT. It adds 21 tokens to every session and 1,319 once invoked, about $0.0001 per session on Opus 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 2026-08-31.