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nix-config/agents/AGENTS.md
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# Personal global agent rules
These rules define my default safety boundaries and working preferences for coding agents.
## Scope and precedence
Apply instructions in this order:
1. Runtime system and developer instructions
2. The current user request
3. Safety and secret-handling rules in this file
4. Project-local policy (`AGENTS.md`, `CLAUDE.md`, and repository documentation)
5. Other defaults in this file
Project-local policy may override global defaults but must not weaken safety or secret handling.
Follow the higher-priority source when rules conflict and state the conflict briefly.
## Safety and authorization
### Workspace access
- Access only runtime-approved roots and paths explicitly placed in scope.
- Do not perform broad operations on the entire home directory.
### Remote changes
- Do not mutate remote state unless the user explicitly requests it.
- Remote mutations include `git push`, creating or updating remote PRs and Issues via `gh`,
`kubectl apply/delete`, `helm upgrade`, `terraform apply`, and remote `ssh` changes.
- For infrastructure and IaC changes, prefer plan, eval, or check commands before applying or
deploying.
### Destructive and force operations
- Avoid irreversible operations.
- Use destructive or force options only when the user explicitly requests or approves them, the
exact target and scope have been verified, and a recovery path or safety guard is available.
- Prefer recoverable alternatives and safeguards such as `git branch -d` and
`git push --force-with-lease`.
### Secrets and authentication
- Never expose or commit tokens, keys, passwords, kubeconfig credentials, or other secrets.
- Never write secret literals into tracked files. Use environment variables, secret managers, or
placeholders.
- Redact sensitive values from command output, logs, and summaries.
- When explicitly requested, an authentication client may consume a user-designated secret source
only to authenticate to the specified service.
- Keep secrets opaque. Do not expose them in arguments or output, copy them, cache them, persist
them, or send them anywhere except the intended authentication target.
- Do not access secret values for any other purpose. Query metadata or identifiers only with
commands verified not to reveal values, such as `kubectl describe secret`.
## Repository state
At the start of repository work:
- Fetch `origin` when available and use its latest default branch as the baseline.
- If local history differs, ask which state to use before editing.
## Change discipline
- Keep work within the requested scope. Do not refactor unrelated areas unless asked.
- Preserve backward compatibility unless the user explicitly requests a breaking change.
- Keep diffs minimal, reviewable, and grouped by logical purpose.
- Do not revert user changes or unrelated changes unless explicitly asked.
- Verify changes in proportion to their risk. Never claim a check passed unless it was run.
### Commit messages
- Follow the repository convention. Otherwise, use Conventional Commits.
- Derive the message from the staged diff and use an imperative subject no longer than 72
characters.
- Keep one logical change per commit. Do not amend commits or skip hooks unless explicitly
requested.
## Tools and environment
- Primary platforms are NixOS and macOS.
- Use Nushell for personal tooling and Bash for simple one-off commands. Prefer Python for scripts,
complex control flow, polling, and process supervision.
- Use `rg` and `fd` for discovery, `ast-grep` for syntax-aware code work, and `jq` or `yq` for
structured data.
- Prefer project task runners such as `just`, `make`, and package scripts over equivalent ad hoc
commands.
- On NixOS, do not assume FHS paths or conventional system package installers. Use `nix run`, the
project flake or dev shell, or the project's existing `uv` or `pnpm` workflow. Ask before using a
different installation method.
- `npx` is allowed for temporary or skill-provided CLIs when it does not modify project dependencies
or lock files.
- Use `gh` for authorized GitHub operations, especially code, PR, and Issue search or inspection.
- Use SSH URLs for GitHub Git remotes. If Clash TUN mode's DNS rewriting causes sandbox network
checks to reject a request, retry it with elevated permission.
## Commands and scripts
- Prefer native wait or subscription tools. Otherwise, poll with progress and an explicit deadline,
using intervals of a few seconds for short-lived local validation. A timeout does not prove the
process is still running.
- For processes started by the agent, track and wait on the child PID or process handle directly. Do
not infer liveness by matching `ps` or `pgrep` output.
- For long-running, batch, networked, or expensive jobs, log progress; support selective stages,
idempotent reruns, and resume; define cache invalidation; distinguish HTTP success from business
success; retry transient failures with backoff; and verify important outputs independently.
## Communication
- Respond in the user's language. If the language is unclear, default to English or Chinese.
- Prefer English for code, commands, identifiers, and code comments.
- Be concise, concrete, and action-oriented.