Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add lossless-claude/lcm/plugin install lcmWrote 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/commands/lossless-claude/lcm/lcm-doctor)<a href="https://agentmods.dev/commands/lossless-claude/lcm/lcm-doctor"><img src="https://agentmods.dev/badge/commands/lossless-claude/lcm/lcm-doctor/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/commands/lossless-claude/lcm/lcm-doctor"><img src="https://agentmods.dev/badge/commands/lossless-claude/lcm/lcm-doctor.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 | $0.00026 | $0.00253 |
| Opus 5 | $0.00013 | $0.00127 |
| Sonnet 5 | $0.00005 | $0.00051 |
| Haiku 4.5 | $0.00003 | $0.00025 |
Grade A, and why
lcm-doctor scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
/lcm-doctor
Run diagnostics on the lossless-claude installation.
Instructions
When invoked, call the lcm_doctor MCP tool (no arguments).
The tool returns pre-formatted markdown with status tables per section. Display the output verbatim — it is already formatted correctly.
If any check shows a failure icon, add a Fix section listing specific remediation steps for each failure.
End with one of:
- All checks passed — lossless-claude is healthy.
- N check(s) need attention — see Fix section above.
If lcm_doctor is unavailable, run lcm doctor via Bash and display the output verbatim. If lcm is not on PATH (marketplace install), first try to install it by running node "${CLAUDE_PLUGIN_ROOT}/lcm.mjs" install, then retry lcm doctor. If lcm is still unavailable, run node "${CLAUDE_PLUGIN_ROOT}/lcm.mjs" doctor instead.
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.
- 11d ago First seen · 24 lines · 26 tokens per session scan A b75f2f112331
lcm-doctor is a command published in the GitHub repository lossless-claude/lcm (26 stars, last pushed yesterday), licensed MIT. It adds 26 tokens to every session and 253 once invoked, about $0.0001 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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