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/billduke13/code-explainer-mcp/smokenpx skills add BillDuke13/code-explainer-mcp --skill smokegit clone --depth 1 https://github.com/BillDuke13/code-explainer-mcpWhat 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 | $0.00039 | $0.00553 |
| Opus 5 | $0.00019 | $0.00277 |
| Sonnet 5 | $0.00008 | $0.00111 |
| Haiku 4.5 | $0.00004 | $0.00055 |
Grade A, and why
smoke scanned grade A with 1 finding 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
for _ in $(seq 1 30); do curl -sf -o /dev/null http://localhost:8787 && break; sleep 1; done What it actually says
Smoke-test the explainCode endpoint
Verify the Worker handles a real explainCode request end to end against the local dev server.
Steps
-
Resolve the secret (never print it). Load
.dev.varsso$SHARED_SECRETis set:set -a; [ -f ./.dev.vars ] && . ./.dev.vars; set +aThe Worker fails closed: if
SHARED_SECRETis unset or still theYOUR_SECRET_KEY_HEREplaceholder, every request returns503. Stop and tell the user to put a real secret in.dev.varsbefore smoke-testing:case "${SHARED_SECRET:-}" in '' | YOUR_SECRET_KEY_HERE) echo 'Set a real SHARED_SECRET in .dev.vars first'; exit 1 ;; esac -
Start the dev server if it isn't already listening on port 8787. Launch
npm run devin the background, then poll until the port answers (bounded to ~30s; fail if it never comes up):for _ in $(seq 1 30); do curl -sf -o /dev/null http://localhost:8787 && break; sleep 1; done curl -sf -o /dev/null http://localhost:8787 || { echo 'dev server did not start within 30s'; exit 1; } -
Send a sample request (use the snippet/language from CLAUDE.local.md if set):
curl -sS -X POST http://localhost:8787 \ -H "Content-Type: application/json" \ -H "Authorization: Bearer $SHARED_SECRET" \ -d '{"method":"explainCode","params":["function add(a, b) { return a + b; }","javascript"]}' -
Check the result: the response must be JSON with a non-empty
resultstring. Report PASS/FAIL and show the first few lines ofresult. On FAIL (non-200, missingresult, or anerrorfield), surface the status code and body. -
Clean up: stop the dev server you started in step 2 (kill the background
wrangler devprocess). Do not stop a server the user already had running.
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 · 43 lines · 39 tokens per session scan A 7d922ad10d48
smoke is a skill published in the GitHub repository BillDuke13/code-explainer-mcp (8 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 39 tokens to every session and 553 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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