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/gtapps/claude-code-hermit/hermit-evolutionnpx skills add gtapps/claude-code-hermit --skill hermit-evolutiongit clone --depth 1 https://github.com/gtapps/claude-code-hermitWhat 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 | $0.00074 | $0.00744 |
| Opus 5 | $0.00037 | $0.00372 |
| Sonnet 5 | $0.00015 | $0.00149 |
| Haiku 4.5 | $0.00007 | $0.00074 |
Grade A, and why
hermit-evolution 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 — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Hermit Evolution
Synthesize a coherent evolution report: cost trend and source split, autonomy and proposal velocity, active routines and watches, top things produced last month, and what grew organically since hatch.
Step 0 — Channel reply
If this skill was invoked from a channel-arrived message (the inbound prompt contains a <channel source="..."> tag), reply via that channel's reply tool. Otherwise emit to conversation.
Step 1 — Dispatch the eval runner
Dispatch claude-code-hermit:skill-eval-runner pointed at ${CLAUDE_PLUGIN_ROOT}/skills/hermit-evolution/reference.md. The runner reads the weekly review files, proposal metrics, config, session reports, and OPERATOR.md — and runs proposal.ts metrics and cost-report.ts reflect — in an isolated context, then returns the assembled evolution report. This keeps those heavy reads off this session's inherited context.
Pass plugin_root: ${CLAUDE_PLUGIN_ROOT} in the dispatch prompt — the runner reads reference.md as file content, where ${CLAUDE_PLUGIN_ROOT} is never substituted, so it needs the resolved absolute path to run the scripts and read template/skill paths.
Eval runner return schema — the runner's return value is a JSON object conforming to this block. The schema is byte-identical in reference.md (producer) and here (consumer); a contract test asserts this.
{
"report": "<assembled ≤1500-char report, section structure above>"
}
Failure policy: if the runner returns null or malformed JSON, fail-open — deliver a one-line "hermit-evolution: snapshot unavailable (analysis-runner failed)" via the Step 0 target and stop.
Step 2 — Deliver
Deliver the runner's report verbatim (≤1500 chars) via the Step 0 target. The runner already omits empty sections; do not re-synthesize. For reference, the report uses this section structure:
### Cost
- Trend (weekly): $A → $B → $C → $X (Δ +/-N%)
- Last 30d: $X.XX total — scheduled (routines/heartbeat): $Y (N%), interactive: $Z (N%)
### Autonomy
- Self-directed: N% this week (vs M% prior, Δ +/-N pp)
### Proposal velocity
- Median resolution: Nd (N proposals, last 30d)
[acceptance-by-source table, rows n>0 only; note triggered kill gates]
### Routines & watches
- heartbeat: every X
- <routine-id>: <cron> · fired N× in last 30d
- watch <monitor-id>: active
### Top-3 produced (inferred)
- <one-line description>
(inferred — no operator-used signal exists)
### Grown since hatch (approximated)
- OPERATOR.md: <sections added, or "no additions vs template">
- Skills: <project-local skill names, or "none">
(approximated — no hatch baseline stored)
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.
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 · 61 lines · 74 tokens per session scan A 17683d456008
hermit-evolution is a skill published in the GitHub repository gtapps/claude-code-hermit (73 stars, last pushed today), licensed MIT. It adds 74 tokens to every session and 744 once invoked, about $0.0004 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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