coding-tools-mcp: Instructions file for Codex

AGENTS.md

coding-tools-mcp AGENTS.md is an instructions file for Codex, OpenCode from shelizi/coding-tools-mcp. It costs 1,353 tokens per session, scanned A, original, Apache-2.0.

Project instructions for an AI coding agent working on shelizi/coding-tools-mcp. They explain which helper tools to call for features, bugs, interface work, unfamiliar code, project context, memory, and commits.

In plain words
What is it for?
Use them when starting a feature or bug fix, changing the interface, exploring unfamiliar code, managing project memory, or preparing a commit.
Why use it?
They give the agent a consistent workflow for finding context, reusing project knowledge, assessing changes, and recording verified fixes.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: reads .claude/ paths.

This is shelizi/coding-tools-mcp's own configuration. It tells Codex and OpenCode how to work on coding-tools-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything coding-tools-mcp configures →

Reuse

Borrowing it

Nothing to install: this file belongs to shelizi/coding-tools-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/shelizi/coding-tools-mcp/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/shelizi/coding-tools-mcp

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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Per session 1,353 This file is loaded in full into every session.
When invoked 1,353 The same file — it is already loaded in full.
Security scan A 0 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 $0.01353 $0.01353
Opus 5.5 $0.00541 $0.00541
Sonnet 5.5 $0.00271 $0.00271
Haiku 4.5 $0.00135 $0.00135

Measured 1mo ago against content hash c7c6319ca37d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

coding-tools-mcp AGENTS.md 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 1mo 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.

AGENTS.md · 80 lines

How it starts

The opening of the file, as written. The whole thing — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MCP (call first)

Requires mcp-probe-kit. Before coding, read Skill: @.agents/skills/mcp-probe-kit/SKILL.md (or When to call MCP) (Skill file auto-created on first MCP call).

  • Unsure which MCP → workflow (returns firstTool)
  • Feature → start_feature (searches memory first)
  • Bug → start_bugfix (searches memory first)
  • UI → start_ui (searches memory first)
  • Unfamiliar code / impact → code_insight (context / impact / auto)
  • Missing context → init_project_context
  • Commit → gencommit

Context: before coding read project-context (links to docs/project-context/) Graph: read latest before large changes; refresh code_insight mode=auto save_to_docs=true Memory (requires MEMORY_* env):

  • Search: start_* auto-injects full memory hits; use search_memory mid-task; read_memory_asset for a specific id
  • Store: do NOT use source_project/source_path for cross-repo pools; put paths in content; write keyword-rich summary
  • Update: fix existing entries in place with update_memory_asset by asset_id (preserves ID)
  • Cleanup: remove stale/wrong/duplicate entries with delete_memory_asset (confirm via read_memory_asset first)
  • After verified bugfix → MUST memorize_asset type=bugfix (sections: symptom, root cause, fix, verification)
  • Reusable feature/UI → memorize_asset type=pattern/component

GitNexus — Code Intelligence

This project is indexed by GitNexus as coding-tools-mcp (2497 symbols, 5234 relationships, 210 execution flows). Use the GitNexus MCP tools to understand code, assess impact, and navigate safely.

If any GitNexus tool warns the index is stale, run npx gitnexus analyze in terminal first.

Always Do

  • MUST run impact analysis before editing any symbol. Before modifying a function, class, or method, run gitnexus_impact({target: "symbolName", direction: "upstream"}) and report the blast radius (direct callers, affected processes, risk level) to the user.
  • MUST run gitnexus_detect_changes() before committing to verify your changes only affect expected symbols and execution flows.
  • MUST warn the user if impact analysis returns HIGH or CRITICAL risk before proceeding with edits.
  • When exploring unfamiliar code, use gitnexus_query({query: "concept"}) to find execution flows instead of grepping. It returns process-grouped results ranked by relevance.
  • When you need full context on a specific symbol — callers, callees, which execution flows it participates in — use gitnexus_context({name: "symbolName"}).

Read the full file on GitHub · 80 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. 1mo ago Changed · +4 lines · +70 tokens per session c7c6319ca37d
  2. 1mo ago First seen · 76 lines · 1,283 tokens per session scan A 019bc5fd5996

Subscribe to this mod's changes

coding-tools-mcp AGENTS.md is an instructions file published in the GitHub repository shelizi/coding-tools-mcp (0 stars, last pushed 8d ago), licensed Apache-2.0. It adds 1,353 tokens to every session, about $0.0054 per session on Opus 5.5. 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 2026-08-31.

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