install-doctor

install-doctor is a skill for Claude Code from chrono-meta/forge-harness. It costs 65 tokens per session (4,127 once invoked), scanned B, original, MIT.

A pre- and post-install checker for finding conflicts, duplicates, and possible overwrites when adding a meta-harness plugin to an existing project.

In plain words
What is it for?
Use it to assess whether an installation overlaps with the current environment, optionally targeting a specific plugin.
Why use it?
It reveals risks involving existing instruction files, skills, hooks, and audit practices before or after installation.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: model in frontmatter; reads .claude/ paths; mentions CLAUDE.md.

Part of the fh-meta plugin — 38 skills, 7 agents shipped together

Good fit Use it to assess whether an installation overlaps with the current environment, optionally targeting a specific plugin.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/chrono-meta/forge-harness/install-doctor
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.

Any agent
npx skills add chrono-meta/forge-harness --skill install-doctor
Clone the repo
git clone --depth 1 https://github.com/chrono-meta/forge-harness

Made for: Claude Code.

Or install fh-meta, the plugin that ships this one along with the rest of its 38 skills, 7 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 install-doctor

README.md
[![agentmods](https://agentmods.dev/badge/skills/chrono-meta/forge-harness/install-doctor/github.svg)](https://agentmods.dev/skills/chrono-meta/forge-harness/install-doctor)
Your own site
<a href="https://agentmods.dev/skills/chrono-meta/forge-harness/install-doctor"><img src="https://agentmods.dev/badge/skills/chrono-meta/forge-harness/install-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.

agentmods 80×15 button for install-doctor

Your own site · 80×15
<a href="https://agentmods.dev/skills/chrono-meta/forge-harness/install-doctor"><img src="https://agentmods.dev/badge/skills/chrono-meta/forge-harness/install-doctor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 65 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,127 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 3 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00065 $0.04127
Opus 5 $0.00032 $0.02063
Sonnet 5 $0.00013 $0.00825
Haiku 4.5 $0.00006 $0.00413

Measured 10d ago against content hash a950d9497545, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade B, and why

install-doctor scanned grade B with 3 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 10d 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.

Reads agent configuration directorieslowAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

os.path.expanduser("~/.claude/settings.json")):

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Reads MCP configurationlowAgent snooping

mcp.json carries server URLs and auth tokens; reading it lets a mod discover and abuse other integrations.

grep -r "\"transport\"" .mcp.json 2>/dev/null | grep -i "http\|sse"

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Enumerates other installed skillslowAgent snooping

Other skills' SKILL.md files reveal prompts, capabilities and secrets that should be invisible to peers.

ls .claude/skills/ 2>/dev/null && echo "Existing skills present" || echo "No existing skills"

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

plugins/fh-meta/skills/install-doctor/SKILL.md · 332 lines

How it starts

The opening of the file, as written. The whole thing — 332 lines — stays where its author put it; the contents beside it link to each section on GitHub.

install-doctor — Plugin Install Conflict Diagnosis

Diagnoses potential conflicts, duplicates, and overwrite risks that may occur when installing meta-harness plugins into an existing project.

Can be installed standalone — works correctly with plugin install alone, without cloning the full meta-harness.

Triggers

/install-doctor                        # Full diagnosis of current environment
/install-doctor --plugin fh-meta       # Diagnose targeting a specific plugin

Step 0. Runtime Environment Requirements Check

FH operates on the assumption of a large context window. If the environment is unsuitable, Input is too long 400 errors may occur during skill execution.

Supported Environments

Environment Support Notes
Claude Code + Anthropic API Key ✅ Recommended 200K context · officially supported
claude.ai Pro / Team Plan ✅ Recommended 200K context · officially supported
AWS Bedrock (direct API) ⚠️ Conditional Possible with sufficient account quota — default quota may be low
Bedrock + claude-code-router + LiteLLM ⚠️ Unofficial Context limit exceeded frequently · not recommended
Internal AI API proxy ⚠️ Conditional Depends on max_input_tokens setting

Environment Check

# Detect community router (Bedrock bypass)
ls /opt/homebrew/lib/node_modules/@musistudio/ 2>/dev/null \
  && echo "⚠️  claude-code-router detected — routing via Bedrock/external proxy" \
  || echo "✅ No community router"

# Claude Code version
claude --version 2>/dev/null || echo "Claude Code not installed"

⚠️ When Bedrock routing confirmed: Request AWS quota increase (TPM/RPM increase) or raise LiteLLM max_input_tokens, then retry. Fundamental solution is switching to direct Anthropic API access.

Node floor check — run on EVERY machine, not once per user

A user's context (companion store, memory, session card) travels between machines; the machine's own setup does not. A rich context makes a fresh laptop read as "already configured", so the two mechanical floors below must be checked per node — this is the check scripts/fh_node_check.sh points at when it reports a missing floor at turn 0.

Read the full file on GitHub · 332 lines

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. 10d ago First seen · 332 lines · 65 tokens per session scan B a950d9497545

Subscribe to this mod's changes

install-doctor is a skill published in the GitHub repository chrono-meta/forge-harness (14 stars, last pushed today), licensed MIT. It adds 65 tokens to every session and 4,127 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 3 findings (reads agent configuration directories, reads mcp configuration, enumerates other installed skills). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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