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 agentmods add skills/swingerman/engineer/arch-checknpx skills add swingerman/engineer --skill arch-checkgit clone --depth 1 https://github.com/swingerman/engineerWhat 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 | $0.00060 | $0.00848 |
| Opus 5 | $0.00030 | $0.00424 |
| Sonnet 5 | $0.00012 | $0.00170 |
| Haiku 4.5 | $0.00006 | $0.00085 |
Grade A, and why
arch-check 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 2d 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 — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.
arch-check
Run the charter architecture fitness check — Checkpoint 7 (Light Verify),
alongside crap-analyzer. Turns the charter's architectural vision from prose
into an objective gate: dae_arch.py reads the manifest's architecture: rules
and reports violations.
Read-only on the codebase — it reports, it does not fix.
When to use
Checkpoint 7, after the feature's code is implemented and refined. Also useful
as a standalone audit (--full) of an existing project.
Not for: change-risk analysis (crap-analyzer); artifact consistency
(consistency-check); fixing violations (that is a human/agent decision per
violation).
Workflow
Step 0 — Entry gate
Verify the prior checkpoint is complete: run
${CLAUDE_PLUGIN_ROOT}/scripts/dae_handoff.py <feature-dir> --through 6. On a
non-zero exit, stop and surface the gap to the human.
Verify branch hygiene: run ${CLAUDE_PLUGIN_ROOT}/scripts/dae_branch.py <feature-dir>.
On a non-zero exit, stop and surface the message to the human — switch
branches and re-invoke. The check honors the git.manual: true manifest
opt-out.
After the gate passes, show the pipeline breadcrumb: run
${CLAUDE_PLUGIN_ROOT}/scripts/dae_progress.py <feature-dir> and present its
output to the human — it shows where this checkpoint sits in the DAE pipeline.
The breadcrumb is advisory: a non-zero exit or a missing progress.md never
blocks the skill. Then create one TodoWrite todo per workflow step below. See
${CLAUDE_PLUGIN_ROOT}/references/progress-indicator.md.
Step 1 — Run the check
Run ${CLAUDE_PLUGIN_ROOT}/scripts/dae_arch.py <methodology-root> (add --full
for a whole-project audit). If it reports "no architecture: section", tell the
user the charter has no machine-readable architecture rules yet and stop.
Step 2 — Present violations
Group the violations by kind (layering first — it is the architectural-vision
core). For each, show file:line and the rule. Do not auto-fix.
Step 3 — Triage with the human
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.
- 2d ago First seen · 80 lines · 60 tokens per session scan A 7e502fe67204
arch-check is a skill published in the GitHub repository swingerman/engineer (144 stars, last pushed 6d ago), licensed MIT. It adds 60 tokens to every session and 848 once invoked, about $0.0003 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 2026-08-30.
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