inquisitor: Instructions file for Codex

AGENTS.md

inquisitor AGENTS.md is an instructions file for Codex, OpenCode from iamalisson/inquisitor. It costs 1,531 tokens per session, scanned A, original, MIT.

A set of always-on instructions for disciplined problem solving by coding agents.

In plain words
What is it for?
Frame a problem, decide whether to delegate, run a focused check, make the smallest suitable change, and verify the relevant runtime behavior.
Why use it?
It helps agents spend effort where the problem requires it by testing the best explanation, limiting unnecessary exploration, and verifying the result.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions AGENTS.md.

This is iamalisson/inquisitor's own configuration. It tells Codex and OpenCode how to work on inquisitor 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 inquisitor configures →

Reuse

Borrowing it

Nothing to install: this file belongs to iamalisson/inquisitor. 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/iamalisson/inquisitor/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/iamalisson/inquisitor

Made for: Codex, OpenCode.

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Per session 1,531 This file is loaded in full into every session.
When invoked 1,531 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 $0.01531 $0.01531
Opus 5.5 $0.00612 $0.00612
Sonnet 5.5 $0.00306 $0.00306
Haiku 4.5 $0.00153 $0.00153

Measured 1mo ago against content hash c6ec11aa601b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

inquisitor 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 · 63 lines

How it starts

The opening of the file, as written. The whole thing — 63 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md — Inquisitor (always-on)

Disciplined problem solving for AI agents: probe, prune, and spend your budget where the problem actually is. You cannot explore every branch — match the depth of the method to the depth of the problem. Overcomplication is a failure mode, exactly like a wrong answer.

This file is the always-on core. The full 7-phase method lives in the inquisitor skill (skills/inquisitor/SKILL.md), mandatory for Deep problems. The inquisitor-mcp server adds web search, project analysis, code tracing, and persistent phase tracking — tools used when local evidence is insufficient, never as ritual.

Don't classify — probe (depth is an output)

An up-front difficulty guess is an LLM's least reliable signal — biased to under-rate the hard problems. So never declare depth; let it emerge. Every problem runs one loop: frame (done = ? / must not break) → delegate? → probe (cheapest action that confirms/kills your best hypothesis) → gate → act (min change) → verify (name the runtime signal). The probe's result sets the depth, not your prediction.

Depth Probe found Do
Shallow Obvious, local, one-liner Fix → verify → done. No ceremony.
Standard Clear single-component cause Frame → minimal evidence → fix → verify. In your head.
Deep Unknown root cause, multi-component, or 2 failed fixes Load inquisitor skill: full 7-phase method + session tracking

Delegate before you dig (router first)

If a purpose-built skill squarely owns the task (/tdd, /code-review, /security-review, …), invoke it via /skill prose and let it drive — the Newton method is the fallback for problems no specialist owns, not the first resort. Also check docs/companion-skills.md if present, unprompted, every pass — inquisitor's own curated pairing list, installed or not. Re-deriving a skill's discipline inline is slop, like re-writing a helper two files over. Finding or installing a NEW skill is a trust-boundary action: surface it to the user, never automatic.

Read the full file on GitHub · 63 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 First seen · 63 lines · 1,531 tokens per session scan A c6ec11aa601b

Subscribe to this mod's changes

inquisitor AGENTS.md is an instructions file published in the GitHub repository iamalisson/inquisitor (5 stars, last pushed 2mo ago), licensed MIT. It adds 1,531 tokens to every session, about $0.0061 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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