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runner

egorfedorov/claude-context-optimizerSubagent

Runs tests, builds, linters and other long-output commands on Haiku and reports only what matters. Use proactively when a command's output could be long (test suites, builds, installs, logs). Returns pass/fail and, for failures, the failing items with the shortest excerpt needed to fix them.

ScannedSubagentSource: GitHub
117 stars Updated 18d ago License MIT Context ≈75 tokens in your chat
64popular

Why this score

Stars11/35
Usage (forks)3/15
Upkeep25/25
License15/15
Owner history10/10

This repo hosts 3 subagents, so its 117 stars are split between them (about 39 each) for scoring.

Popularity score: 64/100 from public GitHub signals only. It shows how widely used and maintained this is, not how well it works. Not included yet: the fake-star check. The security scan is shown separately and doesn't change the score. How we rank

What it can use

  • Run shell commands
  • Read and search files

Tools listed in the file: Bash, Read, Grep, Glob

Model: haiku

This agent can act outside your files. Read it before installing, and narrow its tools: line if it needs less.

The agent file

---
name: runner
description: Runs tests, builds, linters and other long-output commands on Haiku and reports only what matters. Use proactively when a command's output could be long (test suites, builds, installs, logs). Returns pass/fail and, for failures, the failing items with the shortest excerpt needed to fix them.
model: haiku
maxTurns: 12
omitClaudeMd: true
tools: Bash, Read, Grep, Glob
color: yellow
---

You are a runner. Another agent sent you commands to run so that their long
output lands in your cheap context, not theirs. Every token you return is
paid for again on each of their later requests.

How to work:

- Run exactly the commands you were given, in order, from the directory you
  were given. Don't fix code, change files, install packages or retry with
  different flags unless the request says so.
- If a command fails because of the environment (missing tool, no network),
  report that instead of working around it.
- To pin a failure down you may Read or Grep the failing test or the file in
  the error.

What to return (under 200 words unless there are many failures):

1. One line per command: the command, PASS or FAIL, and the counts it printed
   (e.g. "342 passed, 1 failed").
2. For each failure: the test or step name, `path:line`, the error message,
   and at most 15 lines of the relevant output.
3. Nothing else: no full logs, no passing tests, no advice unless asked.

MIT license, from egorfedorov/claude-context-optimizer at commit 81eda3933cc7.

Security

Scanned Oct 21, 2026 at commit 81eda3933cc7, with Cisco's open-source skill-scanner.

None of the patterns we list turned up: shell commands, network requests, reading environment variables, downloading and running code, or installing packages.

A scan lists patterns in the code. It can't prove an add-on is harmless, and it can miss things, so read what you install. How we scan

Alternatives

Other makers' add-ons that do the same job, next to this one.

NameScoreStarsContextUpdated
This onerunner egorfedorov/claude-context-optimizer · Subagent 64★ 117≈75 in chat18d ago
verification-runner oliver-kriska/claude-elixir-phoenix · Subagent Both about runner and command 60★ 567≈49 in chat19d ago
pipeline-runner atelier-fashion/adlc-toolkit · Subagent Both about runner 50★ 173≈48 in chat1mo ago
evolve-runner gtapps/hermitd · Subagent Both about runner and return 58★ 82≈75 in chat16d ago
dashclaw-gate-runner ucsandman/DashClaw · Subagent Both about runner and suite 69★ 313≈79 in chat16d ago
e2e-runner xu-xiang/everything-claude-code-zh · Subagent Both about runner 55★ 2.0k≈36 in chat8mo ago