cortex AGENTS.md

cortex AGENTS.md is an instructions file for Codex, OpenCode from abdul-hamid-achik/cortex. It costs 7,605 tokens per session, scanned A, original, MIT.

A project guide for coding agents and developers working on the Cortex codebase, a local tool that helps software-engineering agents investigate, change, and verify code.

In plain words
What is it for?
Use it to understand Cortex’s directories, reasoning process, specialist tools, and development commands before modifying the project.
Why use it?
It keeps important architecture, rules, commands, evidence, and uncertainty in one durable place, so long coding tasks are less likely to lose context or skip verification.

Instructions file for CodexOpenCode

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 instructions/abdul-hamid-achik/cortex/agents-md
Clone the repo
git clone --depth 1 https://github.com/abdul-hamid-achik/cortex

Made for: Codex, OpenCode.

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README.md
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ModelPer sessionOnce invoked
Fable 5 $0.07605 $0.07605
Opus 5 $0.03802 $0.03802
Sonnet 5 $0.01521 $0.01521
Haiku 4.5 $0.00760 $0.00760

Measured 3d ago against content hash da5d55d4aae0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

cortex 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 3d 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 · 440 lines

How it starts

The opening of the file, as written. The whole thing — 440 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Instructions for AI agents (and humans) working on the cortex codebase. This is the canonical source-of-truth doc; CLAUDE.md defers to it. README.md is the public-facing intro. Architecture, behavior, and contributor rules that must remain durable belong here. Design rationale and working notes belong in the Obsidian vault at ~/notes/projects/cortex/, not the repo.

Project Overview

cortex is a local-first, evidence-guided agent kernel for software-engineering agents. It sits between an LLM and a set of specialist tools (Bob, codemap, vecgrep, cairntrace, glyphrun, fcheap, vidtrace, tvault, veclite) and enforces a stateful reasoning loop:

orient → investigate → form hypotheses → declare a boundary → change → verify → preserve evidence

Cortex does not replace the model's planning or coding ability. It supplies what models are bad at preserving across long tool-using tasks: a durable case file, explicit evidence and uncertainty, disciplined tool routing, bounded changes, and verification tied to user-visible behavior.

Two surfaces over one kernel (the ecosystem pattern — cf. codemap/vecgrep):

  • CLI — human commands and --json machine output for agents (Cobra + Charm v2 lipgloss).
  • MCP servercortex serve (stdio), a 17-tool agent profile by default; --profile all exposes the full 24-tool operator surface.

Product docs: docs/quick-start.md (humans), docs/mcp.md (agents). Monitor sessions with cortex sessions / cortex show --json instead of the removed Studio TUI (docs/studio.md).

Directory Structure

cortex/
├── cmd/cortex-trajectory/    # opt-in trusted empirical harness; separate from runtime/release CLI
├── cmd/cortex/               # Cobra CLI, split per-command. Each RunE is THIN → builds a
│                             #   kernel (kernelFor) → calls internal/kernel. Files carry the
│                             #   header `/* Copyright © 2026 abdul hamid <[email protected]> */`.
│   ├── main.go               #   root command, persistent --workspace/-C and --json flags
│   ├── open / start / investigate / plan / change / verify / remember / status .go
│   ├── note / decision / handoff / doctor / serve .go
│   └── render.go             #   lipgloss v2 styled view + --json emit (TTY-gated color)
├── internal/
│   ├── domain/               # core types — NO deps on adapters/store/transport
│   │   ├── case.go           #   CaseFile + Phase machine (transitions, invariants)
│   │   ├── acceptance.go     #   optional immutable criteria + transport-independent bounds
│   │   ├── evidence.go       #   Evidence, EvidenceKind, Confidence, Sensitivity
│   │   ├── hypothesis.go     #   Hypothesis + Disproof (the disproof-path gate)
│   │   ├── plan.go           #   Plan + planning-gate validation
│   │   ├── verification.go   #   typed claims + VerificationRecord + statuses
│   │   ├── lease.go decision.go # change ownership + resumable human decisions
│   │   ├── envelope.go       #   the shared MCP/CLI result envelope
│   │   └── policy.go         #   routing matrix, budget, surface→verifier map
│   ├── kernel/               # SHARED SERVICE LAYER — CLI + MCP both call this
│   │   ├── kernel.go         #   Kernel struct, evidence stamping, phase transition helper
│   │   ├── orient.go open.go #   new task + idempotent open/resume
│   │   ├── investigate.go    #   Investigate (route → discovery → candidates → structural expansion → record evidence)
│   │   ├── plan.go           #   Plan (rejects no-disproof / no-boundary plans)
│   │   ├── change.go lease.go #  explicit begin-change + bounded ownership
│   │   ├── verify.go assessment.go # typed verification + canonical task assessment
│   │   ├── persist.go        #   Remember (durable memory + summary.md + completion invariant)
│   │   ├── resolve.go        #   Resolve (confirm/challenge/reject a hypothesis)
│   │   ├── recall.go         #   Cross-case disproof recall: index hooks + recall
│   │   ├── observe.go decision.go handoff.go actions.go artifact.go # human/agent collaboration + projections
│   │   ├── status.go         #   Status / AbortTask / ReadEvidence / ListTasks
│   │   └── scope.go          #   scope-drift detection vs the declared boundary
│   ├── adapters/             # one file per tool; flat package sharing exec/redact plumbing
│   │   ├── adapter.go        #   Adapter interface, Request/Result/Fact, Capability/Status
│   │   ├── exec.go           #   runner (fakeable), timeout, redaction, ErrToolMissing
│   │   ├── registry.go       #   Registry + concurrent Health probe
│   │   ├── bob.go codemap.go vecgrep.go fcheap.go cairntrace.go glyphrun.go vidtrace.go tvault.go veclite.go command.go
│   │   └── util.go           #   pluralize / decodeJSON / clip helpers
│   ├── store/
│   │   ├── casefs/           #   JSON/JSONL case-file persistence ($XDG_STATE_HOME/cortex/sessions/<repo>/<id>/)
│   │   └── redact/           #   secret-shape redaction (last-line filter before model output)
│   ├── mcp/server.go         # stdio MCP server — THIN pass-through (17 agent / 24 all)
│   ├── tui/board.go          # Legacy Charm v2 board (not wired to the CLI)
│   ├── config/               # XDG paths + cortex.yaml (budget/redact/cases_dir/recall/verifiers) + env
│   ├── ids/                  # time-sortable Crockford-base32 IDs (task_/ev_/hyp_/vr_/dec_/raw_)
│   ├── eval/                 # deterministic scorecard + separate opt-in trajectory runner contract
│   ├── forge/forge.go        # PR review action (ModeReview: PR fetch + APPROVE/REQUEST CHANGES verdict)
│   └── version/version.go    # Version/Commit/Date (ldflags-injected)
├── docs/                     # VitePress site (product docs ONLY) → deploy to Vercel
├── contracts/v1/             # public deterministic JSON/MCP conformance schema + fixtures
├── evaluations/              # trusted empirical manifests, repository fixtures, and independent oracles
├── specs/                    # glyphrun E2E specs (*.yml)
├── .github/workflows/        # ci.yml (test+race+build+lint+docs) · release.yml (goreleaser on tags)
├── Taskfile.yml .golangci.yml .goreleaser.yaml
└── README.md AGENTS.md CLAUDE.md CHANGELOG.md LICENSE

Read the full file on GitHub · 440 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. 3d ago First seen · 440 lines · 7,605 tokens per session scan A da5d55d4aae0

Subscribe to this mod's changes

cortex AGENTS.md is an instructions file published in the GitHub repository abdul-hamid-achik/cortex (1 stars, last pushed 5d ago), licensed MIT. It adds 7,605 tokens to every session, about $0.0380 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 2026-08-31.

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