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 Snowflake-Labs/cocoplus --skill stage-coachgit clone --depth 1 https://github.com/Snowflake-Labs/cocoplusWrote 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/snowflake-labs/cocoplus/stage-coach)<a href="https://agentmods.dev/skills/snowflake-labs/cocoplus/stage-coach"><img src="https://agentmods.dev/badge/skills/snowflake-labs/cocoplus/stage-coach/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/snowflake-labs/cocoplus/stage-coach"><img src="https://agentmods.dev/badge/skills/snowflake-labs/cocoplus/stage-coach.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 | $0.00019 | $0.00543 |
| Opus 5.5 | $0.00008 | $0.00217 |
| Sonnet 5.5 | $0.00004 | $0.00109 |
| Haiku 4.5 | $0.00002 | $0.00054 |
Grade A, and why
stage-coach 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 — 63 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Use this skill for queued per-stage coach reviews from .cocoplus/sentinel/coach-requests.jsonl.
Objective
Evaluate completed CocoFlow stages with a separate coach model so generator and critic remain structurally separated.
Workflow
- Verify
.cocoplus/exists. - Read
.cocoplus/sentinel/coach-requests.jsonl. - For each queued request, collect:
- stage role and task brief from
.cocoplus/flow.json - declared
artifacts.readsandartifacts.writes - produced artifact paths under
.cocoplus/flow/artifacts/<run-id>/ - downstream missing artifact status
- stage role and task brief from
- Verify
coach_modeldiffers from the executor model. If not, write.cocoplus/sentinel/known-gaps.jsonland skip the request. - Run an external coach evaluation using the configured coach model.
- Write
.cocoplus/sentinel/stage-quality.jsonl:
{
"ts": "...",
"stage_id": "function-designer",
"score": 7,
"reasoning": "Specific evidence-backed rationale.",
"attributed_to": "function-designer",
"coach_model": "haiku"
}
- Mark consumed requests as processed by writing
.cocoplus/sentinel/coach-requests.processed.jsonl.
Scoring
8-10: usable output with clear artifact handoff5-7: core output exists but a declared contract, evidence item, or handoff is incomplete<5: missing required output, ungrounded result, or downstream blocker attributable to this stage
Exit Criteria
- Each score cites produced or missing artifacts.
- The coach never evaluates its own generation.
- Missing artifacts are attributed to the stage that declared them.
- Console-readable
stage-quality.jsonlis updated.
Anti-Rationalization
| Shortcut / Temptation | Why It Fails |
|---|---|
| Treat the skill as complete because the file exists | Skill contracts must describe observable behavior and verification, not just command names. |
| Skip artifact and safety checks for a small command | Small commands still mutate state or guide execution; preserve the same gates. |
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 · 63 lines · 19 tokens per session scan A a1ef08307282
stage-coach is a skill published in the GitHub repository Snowflake-Labs/cocoplus (726 stars, last pushed 23d ago), licensed MIT. It adds 19 tokens to every session and 543 once invoked, about $0.0001 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 2026-09-03.
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