sixb: Instructions file for Codex

AGENTS.md

sixb AGENTS.md is an instructions file for Codex, OpenCode from sixb-ai/sixb. It costs 3,796 tokens per session, scanned A, original, MIT.

A repository guide for sixb, a Bun-and-TypeScript project with a server, command-line tool, React interface, shared components, connectors, and storage providers. It maps the main packages and records the required development tools.

In plain words
What is it for?
Use it when modifying the runtime, HTTP or WebSocket API, React interface, command-line tool, generated client, integrations, or examples.
Why use it?
It helps agents find the right package and use the project’s required Bun and Biome workflow instead of incompatible commands.

Instructions file for CodexOpenCode

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

This is sixb-ai/sixb's own configuration. It tells Codex and OpenCode how to work on sixb 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 sixb configures →

Reuse

Borrowing it

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

Made for: Codex, OpenCode.

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.

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README.md
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Per session 3,796 This file is loaded in full into every session.
When invoked 3,796 The same file — it is already loaded in full.
Security scan A 1 finding. 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 $0.03796 $0.03796
Opus 5.5 $0.01518 $0.01518
Sonnet 5.5 $0.00759 $0.00759
Haiku 4.5 $0.00380 $0.00380

Measured 2d ago against content hash 87d07571d9e0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

sixb AGENTS.md scanned grade A with 1 finding 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 2d 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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

- No `Bun.spawnSync` in a test. Inside `bun test --parallel` it sometimes never sees its child
AGENTS.md · 234 lines

How it starts

The opening of the file, as written. The whole thing — 234 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Repo-wide agent instructions for sixb.

Scope

  • This file applies to the whole repository unless a nearer AGENTS.md is added later.
  • Keep one root AGENTS.md for now. Add nested files only when a package genuinely needs different instructions.

Repo Map

  • packages/core: runtime, ontology builders, providers, and validation
  • packages/server: Elysia HTTP/WebSocket API and OpenAPI generation
  • packages/ui: shared React component library; knows nothing about Sixb, so the docs site uses it
  • packages/client: generated typed client artifacts
  • packages/cli: CLI entrypoint for sixb
  • packages/create-sixb: zero-dependency project scaffolder and template
  • packages/app: the project app: shell, built-in pages (Home, the agent, object pages, and the Console and Settings sections in src/pages/), dev server and build
  • models/: model providers such as Anthropic and Vercel AI Gateway
  • connectors/, storage/, broker/: integrations and infrastructure providers
  • env/: where a project's environment variables live, such as Doppler
  • examples/: runnable sample projects

Toolchain

  • Bun only for package management, scripts, and runtime. Do not use npm, pnpm, yarn, or Vite CLI commands.
  • TypeScript is strict, targets ES2022, uses ESNext modules, and moduleResolution: "bundler".
  • Formatting and linting are enforced with Biome.
  • Prefer rg and rg --files for search.

Core Commands

Repo-wide:

bun install
bun run build
bun run typecheck
bun run test
bun run test:e2e
bun run test:all
bun run check
bun run check:fix
bun run generate:client
bun sixb dev
bun create-sixb my-app

Targeted:

bun --filter @sixb/core build
bun --filter @sixb/core typecheck
bun test packages/core/tests/create-sixb.test.ts
bun test packages/server/tests/

CI runs these as independent parallel jobs (each does bun install --frozen-lockfile first):

  • typecheck: bun run typecheck
  • build: bun run build, then bun run typecheck:consumers, then bun run test:publish
  • client: bun run generate:client, then git diff --exit-code
  • test: bun run test:ci
  • lint: bun run check
  • e2e: package-scoped matrix jobs for packages with test:e2e

Read the full file on GitHub · 234 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. 2d ago Changed · +1 lines · +17 tokens per session 87d07571d9e0
  2. 4d ago Changed · -6 tokens per session 70c6485a065f
  3. 7d ago Changed · +4 lines · +80 tokens per session 22967625578f
  4. 15d ago Changed · +20 lines · +408 tokens per session d37707926f7f
  5. 20d ago Changed · +3 lines · +66 tokens per session 20012a10732c
  6. 23d ago Changed d7b823676a68
  7. 26d ago Changed · +23 tokens per session 0fd09bad12fe
  8. 27d ago Changed · +3 tokens per session 057d876c0e6e
  9. 1mo ago Changed · +13 lines · +143 tokens per session 564ad1dceb70
  10. 2mo ago First seen · 193 lines · 3,062 tokens per session scan A 70b11bfc789b

Subscribe to this mod's changes

sixb AGENTS.md is an instructions file published in the GitHub repository sixb-ai/sixb (134 stars, last pushed yesterday), licensed MIT. It adds 3,796 tokens to every session, about $0.0152 per session on Opus 5.5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

sixb AGENTS.md compared with instructions from other repositories

sixb AGENTS.md next to 6 instructions from other repositories
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vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file274k2d agoMITA4,313Codex, OpenCode