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/supportersimulator/3-surgeons/post-implementation-verificationnpx skills add supportersimulator/3-surgeons --skill post-implementation-verificationgit clone --depth 1 https://github.com/supportersimulator/3-surgeonsWrote 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/supportersimulator/3-surgeons/post-implementation-verification)<a href="https://agentmods.dev/skills/supportersimulator/3-surgeons/post-implementation-verification"><img src="https://agentmods.dev/badge/skills/supportersimulator/3-surgeons/post-implementation-verification.svg" alt="Measured on agentmods" 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 | $0.00020 | $0.00799 |
| Opus 5 | $0.00010 | $0.00400 |
| Sonnet 5 | $0.00004 | $0.00160 |
| Haiku 4.5 | $0.00002 | $0.00080 |
Grade A, and why
post-implementation-verification 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.
How it starts
The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Post-Implementation Verification
Purpose
"It works on my machine" is not verification. This gate ensures that completed work is verified across infrastructure health, regression detection, and adversarial review before anyone claims "done."
Auto-Invocation Trigger
Invoke before ANY of these claims:
- "Done" / "complete" / "finished" / "implemented"
- "Ready for review" / "ready to merge"
- "All tests pass" (verify this claim, do not just assert it)
- "The fix is in" / "bug is resolved"
- Transitioning from executing-plans to completion
Checklist
You MUST create a TodoWrite task for each step:
-
Run gains-gate — is infrastructure still healthy after changes? Changes can break things silently (port conflicts, stale locks, broken configs).
-
Sentinel re-scan on actual changes — scan the diff of what was actually implemented, not the original plan. Implementation often drifts from plan. The sentinel catches complexity introduced during implementation.
# Get the diff for sentinel input git diff --stat HEAD~N # or appropriate range git diff HEAD~N # full diff for sentinel content -
If >3 files changed: quick consensus vote — ask all 3 surgeons: "Did we introduce regression?" with the actual diff as context. This catches issues that tests miss.
-
Verify tests pass — run the actual test suite. Do not claim tests pass without running them. If no tests exist for the changed code, flag this as a gap.
-
Counter-position: "What did we miss?" — invoke counter-position with the claim "this implementation is complete and correct." Steelman why it is not.
-
Present verification results — summarize all findings. Only claim completion if all checks pass. If any check fails, fix the issue and re-run verification.
Diff-Based Sentinel Scan
The post-implementation sentinel scan differs from pre-implementation:
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.
- 4d ago First seen · 93 lines · 20 tokens per session scan A 6060e16a3e06
post-implementation-verification is a skill published in the GitHub repository supportersimulator/3-surgeons (2 stars, last pushed 3mo ago), licensed MIT. It adds 20 tokens to every session and 799 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.
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