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/cost-reflectnpx skills add gtapps/claude-code-hermit --skill cost-reflectgit clone --depth 1 https://github.com/gtapps/claude-code-hermitWrote 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/gtapps/claude-code-hermit/cost-reflect)<a href="https://agentmods.dev/skills/gtapps/claude-code-hermit/cost-reflect"><img src="https://agentmods.dev/badge/skills/gtapps/claude-code-hermit/cost-reflect.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 | $0.00084 | $0.01021 |
| Opus 5 | $0.00042 | $0.00511 |
| Sonnet 5 | $0.00017 | $0.00204 |
| Haiku 4.5 | $0.00008 | $0.00102 |
Grade A, and why
cost-reflect 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 yesterday.
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 — 59 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cost Reflect
Runs a structural cost audit over the last 7 days of cost-log.jsonl and delivers the result to the operator. The math is done by a script — your job is to run it and deliver the output through the right channel.
Invocation mode
- Manual (no arguments): reply only to the invoking terminal or channel conversation.
- Automated (
--maintainer, or any routine/proactive invocation): produce the full technical report and send it as a maintainer-tier notice.
Step 1 — Run the analyzer
On a channel-tagged turn without --maintainer (the inbound prompt contains a <channel source="..."> tag), run
the plain-language mode instead of the full breakdown — a channel operator asking "why is my bill
high" shouldn't get raw token-category jargon:
bun ${CLAUDE_PLUGIN_ROOT}/scripts/cost-report.ts reflect .claude-code-hermit --plain
Otherwise (terminal/dev use or --maintainer), run the full breakdown:
bun ${CLAUDE_PLUGIN_ROOT}/scripts/cost-report.ts reflect .claude-code-hermit
Capture stdout. If the output starts with "No cost data" or "No spend recorded yet", report that message and stop — there's nothing to send.
Step 2 — Relay the report
Terminal: the script output is already formatted and capped at 1500 characters. Relay it verbatim. Don't summarize, reformat, or add commentary — the output is the report.
Channel (--plain output): reply through that channel's reply tool. The script output is already plain language and jargon-free — no cache_read/cache_write/token-type labels, no session IDs, no PROP-/S-NNN, no slash commands. Relay it translated into the operator's language if the inbound message wasn't in English. Translation only — add no commentary and don't reintroduce token-category detail.
Step 3 — Channel delivery
When $ARGUMENTS contains --maintainer (or the invocation is a routine/proactive prompt rather than
a direct operator conversation), deliver the report through the operator's channel. Spend detail is
maintainer-tier by definition, so send it as the maintainer leg only (no client leg):
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.
- yesterday Changed · -8 lines 770b33d0e202
- 5d ago First seen · 67 lines · 84 tokens per session scan A 5a02228530b5
cost-reflect is a skill published in the GitHub repository gtapps/claude-code-hermit (73 stars, last pushed yesterday), licensed MIT. It adds 84 tokens to every session and 1,021 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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