lcm-e2e

lcm-e2e is a skill for Claude Code from lossless-claude/lcm. It costs 67 tokens per session (745 once invoked), scanned A, original, MIT.

A test procedure for checking a real lcm installation from start to finish, including its background service, hooks, importing, summarizing, retrieval, and recovery behavior.

In plain words
What is it for?
Use it for full end-to-end validation or to test focused areas such as importing, hooks, retrieval, or installation health.
Why use it?
It finds failures in the installed system and shows which part of the workflow is not working.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the lcm plugin — 7 skills, 10 commands, 4 agents shipped together

Install

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.

agentmods
npx agentmods add skills/lossless-claude/lcm/lcm-e2e
Any agent
npx skills add lossless-claude/lcm --skill lcm-e2e
Clone the repo
git clone --depth 1 https://github.com/lossless-claude/lcm

Made for: Claude Code.

Or install lcm, the plugin that ships this one along with the rest of its 7 skills, 10 commands, 4 agents.

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.

agentmods badge for lcm-e2e

README.md
[![agentmods](https://agentmods.dev/badge/skills/lossless-claude/lcm/lcm-e2e.svg)](https://agentmods.dev/skills/lossless-claude/lcm/lcm-e2e)
Your own site
<a href="https://agentmods.dev/skills/lossless-claude/lcm/lcm-e2e"><img src="https://agentmods.dev/badge/skills/lossless-claude/lcm/lcm-e2e.svg" alt="Measured on agentmods" height="20"></a>
Per session 67 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 745 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00067 $0.00745
Opus 5 $0.00034 $0.00373
Sonnet 5 $0.00013 $0.00149
Haiku 4.5 $0.00007 $0.00075

Measured 6d ago against content hash e048db8ae54e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

lcm-e2e 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 6d 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.

.claude-plugin/skills/lcm-e2e/SKILL.md · 62 lines

How it starts

The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Current state

lcm binary

!lcm --version 2>/dev/null || echo "ERROR: lcm not in PATH"

Daemon status

!lcm status 2>/dev/null || echo "Daemon not running"

Task

Run the E2E validation checklist from .claude-plugin/skills/lcm-e2e/checklist.md.

Arguments: $ARGUMENTS

  • If $ARGUMENTS is empty → run all flows in order
  • If $ARGUMENTS is import → run Flows 1, 2, 3, 4
  • If $ARGUMENTS is compact → run Flows 1, 2, 5
  • If $ARGUMENTS is promote → run Flows 1, 2, 5, 6
  • If $ARGUMENTS is curate → run Flows 1, 2, 5, 6, 7
  • If $ARGUMENTS is retrieval → run Flows 1, 2, 5, 6, 8
  • If $ARGUMENTS is hooks → run Flows 1, 2, 9, 10, 14, 15, 16, 18
  • If $ARGUMENTS is doctor → run Flows 1, 11, 12, 19
  • If $ARGUMENTS is cleanup → run Flow 13 only

Steps

  1. Read the checklist: .claude-plugin/skills/lcm-e2e/checklist.md
  2. Determine which flows to run based on arguments
  3. For each step in each flow: a. Print the step description b. Run the command c. Evaluate against expected output d. Mark ✓ (pass) or ✗ (fail) with a one-line explanation
  4. If a flow fails a critical step, note it and continue (don't abort)
  5. Always run Flow 13 (cleanup) at the end of the full suite
  6. Print the summary table with actual ✓/✗ results

CRITICAL: Data Isolation

Live mode NEVER touches user data.

All operations use an isolated temp directory as cwd:

  • Create: mktemp -d /tmp/lcm-e2e-test-XXXXXX
  • This temp cwd creates a separate project database under ~/.lossless-claude/projects/<hash>/
  • The user's real project data is never accessed
  • Cleanup removes both the temp dir AND the project under ~/.lossless-claude/projects/

Important notes

  • This modifies ONLY temp/test directories — never the user's real project
  • Auto-heal flow (16) is READ-ONLY in live mode: verify hooks exist, don't break them
  • If lcm is not in PATH, show an error and stop
  • If daemon is not running, try lcm daemon start --detach first
  • Do not abort on first failure — the goal is a complete picture

Read the full file on GitHub · 62 lines

Files

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.

Changes

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.

  1. 6d ago First seen · 62 lines · 67 tokens per session scan A e048db8ae54e

Subscribe to this mod's changes

lcm-e2e is a skill published in the GitHub repository lossless-claude/lcm (24 stars, last pushed today), licensed MIT. It adds 67 tokens to every session and 745 once invoked, about $0.0003 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.

Related

Other skills, from other repositories

dogfood

Systematically explore and test a mobile app on iOS/Android with agent-device to find bugs, UX issues, and other problems. Use when asked to dogfood, QA, exploratory test, find issues, bug hunt, or test this app on mobile.

callstack/agent-device · 55 tokens

test-warp-ui

Guides testing Warp UI features and changes using the computer use tool. Use this skill only when computer-use testing was requested (explicit request or accepted offer) and the computeruse tool is available to the agent. Covers launching Warp and verifying UI behavior.

warpdotdev/warp · 55 tokens

test-electron-app

Drive the real running PostHog Electron app (live tRPC, workspace-server, real data) over CDP with agent-browser. Connect to the running app on port 9222, test desktop changes against a local Django stack, snapshot the accessibility tree, inspect network requests, and screenshot only when explicitly asked. Use when…

PostHog/posthog-foss · 112 tokens

pyats-dynamic-test

Generate and execute deterministic pyATS aetest validation scripts - interface state, OSPF neighbors, BGP paths, ping matrices, and custom compliance tests. Use when writing a network test, validating post-change state, running pass/fail checks, or building automated regression tests.

automateyournetwork/netclaw · 61 tokens

trailblaze

Use when working with Trailblaze — natural-language device control for coding agents across iOS, Android, and web, with replayable .trail.yaml files as the artifact. Trigger on mentions of Trailblaze, the trailblaze CLI, .trail.yaml files, trailmaps, waypoints, or requests to drive / author / debug / run UI tests on…

block/trailblaze · 115 tokens

Detox Mobile Testing

Gray-box end-to-end testing for React Native apps with Detox. Covers .detoxrc.js configuration, build and test commands, matchers, device.launchApp control, automatic synchronization, and macOS CI pipelines.

PramodDutta/qaskills · 48 tokens