Getting it into your agent
There is no command for this one: it runs only inside a plugin, and the catalogue could not identify which plugin ships it. The source is linked below.
Wrote 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/kevin-liu-01/agent-machines/last30days)<a href="https://agentmods.dev/skills/kevin-liu-01/agent-machines/last30days"><img src="https://agentmods.dev/badge/skills/kevin-liu-01/agent-machines/last30days/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/kevin-liu-01/agent-machines/last30days"><img src="https://agentmods.dev/badge/skills/kevin-liu-01/agent-machines/last30days.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 | $0.00049 | $0.31950 |
| Opus 5 | $0.00024 | $0.15975 |
| Sonnet 5 | $0.00010 | $0.06390 |
| Haiku 4.5 | $0.00005 | $0.03195 |
Grade A, and why
last30days scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
2 near-identical copies found in the catalogue:
- last30days — 100% identical, 0 lines differ
- last30days — 95% identical, 147 lines differ
How it starts
The opening of the file, as written. The whole thing — 1,667 lines — stays where its author put it; the contents beside it link to each section on GitHub.
STEP 0: CANONICAL PATH SELF-CHECK — RUN BEFORE READING BELOW
Before reading anything else in this file, verify that the SKILL.md you just loaded is the versioned cache copy, not a stale marketplace clone:
CANONICAL_ROOT="$HOME/.claude/plugins/cache/last30days-skill/last30days"
CANONICAL_LATEST=$(ls -d "$CANONICAL_ROOT"/*/ 2>/dev/null | sort -V | tail -1)
CANONICAL_LATEST="${CANONICAL_LATEST%/}"
If the SKILL.md file you just read is NOT under $CANONICAL_LATEST/, STOP and re-read $CANONICAL_LATEST/SKILL.md before proceeding. Do not run --help, do not plan, do not invoke the engine against any other path.
Why: ~/.claude/plugins/marketplaces/last30days-skill/ is a git clone Claude Code auto-restores to origin/main on session start. It can lag the versioned cache by one or more releases. Three 2026-04-22 test runs (Linear, Coinbase) loaded SKILL.md from marketplaces/, ran --help from the same stale path, did not see the --competitors flag that existed in the cache, and fell back to a manual comparison plan. Result: 2 of 3 windows never invoked the feature they were asked to test.
How to self-check: the file path you used in your last Read tool call should match $CANONICAL_LATEST/SKILL.md. If it contains marketplaces/ or any other prefix, that is the stale-path failure mode. Re-read from $CANONICAL_LATEST/SKILL.md and restart this contract from the top.
The same pinned resolver appears later in Step 1 for the engine Bash invocation. That guard is necessary but insufficient — by the time you reach Step 1, you may have already internalized an out-of-date flag list from the stale SKILL.md above it. This STEP 0 runs first so the CONTRACT itself is read from the right file.
SKILL CONTRACT — READ BEFORE ANY TOOL CALL
You are inside the /last30days SKILL. This is a specific research tool with a 1400+ line instruction contract (the rest of this file) that defines EXACTLY how to produce the research output. It is not a generic "last 30 days of X" research prompt. Do NOT treat /last30days as a search keyword you can improvise against.
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.
- 8d ago First seen · 1,667 lines · 49 tokens per session scan A 014f3c98c4ed
last30days is a skill published in the GitHub repository Kevin-Liu-01/Agent-Machines (29 stars, last pushed yesterday), licensed MIT. It adds 49 tokens to every session and 31,950 once invoked, about $0.0002 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 2026-09-03.
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