packet-ask

Korean

A local CLI that sends only a scrubbed packet to a SUB agent. The MAIN agent is whichever session you are in now.

It copies the files or diff you choose, scrubs them, then either runs an official CLI against that packet or prints packet.md to paste elsewhere.

This tool shrinks what you send on purpose. It does not guarantee no leakage and does not stop vendor training. Vendor terms still apply. See SECURITY.md (Korean).

MIT licensed. See LICENSE.

• PyPI: pypi.org/project/packet-ask
• Repository: github.com/ictechgy/packet-ask

Requirements

• Python 3.11+
• uv 0.10.9+ (same lower bound as uv_build in pyproject.toml)
• GLM / Claude SUB runs: a claude CLI on the allowlist path (origin signatures are not verified)
• Kimi runs: a kimi CLI on the allowlist path
• paste / grok / agy print a packet and do not launch a vendor

Credentials come from a dedicated environment variable, a packet-ask-owned macOS Keychain item, or an explicitly requested one-run prompt. This tool does not read .env, ZCode, Claude Code, arbitrary key files, or key commands. Never put key values on the command line; they land in shell history. The same applies to the question: --question is argv and is visible in the process table and in shell history, so prefer --question-stdin. Stdin keeps the question out of argv, but it does not control what an interactive shell records; read a sensitive question from a file rather than a typed heredoc. Variable names are in .env.example, and the complete source contract is in docs/key-sources.md. The executable allowlist is in SECURITY.md. Claude-family launches use official bare mode, an empty built-in tool set, and strict explicit empty MCP configuration. doctor only checks that bounded help text mentions those required flags; it does not prove an OS sandbox.

Install

uv tool install packet-ask
packet-ask install-skills
packet-ask doctor

If it is already installed, run uv tool upgrade packet-ask. pipx install packet-ask and pip install packet-ask in a venv also work.

From the GitHub default branch:

uv tool install git+https://github.com/ictechgy/packet-ask

Local checkout:

uv sync
uv run packet-ask doctor

install-skills writes SKILL.md to ~/.claude/skills/packet-ask, ~/.grok/skills/packet-ask, ~/.codex/skills/packet-ask, and ~/.agents/skills/packet-ask. After that, /packet-ask or a phrase like "review with kimi" should make MAIN call this CLI.

Scope

review and research are the only task commands. review requires one of the flags below. It does not send the whole working tree by default.

research does not attach local files or diffs by default. The only exception is --include-files. --diff and --staged are rejected.

inspect review and inspect research build and verify the same scrubbed packet but print metadata only after cleanup. They do not load a provider, inspect a credential, calculate a provider timeout, or launch a vendor. Human output is one escaped line; --json returns only the fixed packet summary fields. --breakdown additively reports scrubbed question bytes, framing bytes, and per-file/diff scrubbed bytes, logical lines, and allowlisted redaction counts. Line counts describe only the post-scrub payload, use LF as the separator, and are per-item only (0 for a zero-byte file). A diff count covers its complete rendered diff, including headers and hunks—not just changed lines. This per-item shape metadata is disclosed by design; the question and item body are never returned.

--line-numbers opt-in adds a fixed-width gutter to scrubbed full-file content inside packet.md, so a review can cite packet-local lines. It does not alter the scrubbed files under files/, never decorates unified diffs, and counts all gutter/note bytes against --max-bytes. The numbers are stable only for the receipt's packet digest. With the flag off, packet bytes remain unchanged.

--selected-tree opt-in adds a deterministic tree made only from paths already selected by --files or --include-files. It never walks the repository, shows repeated selections once, renders ASCII-escaped labels in an inert fenced text block, and counts the tree against --max-bytes. Diff-only and question-only packets reject the flag instead of silently widening or ignoring its scope.

File section headings preserve ordinary Unicode paths but escape line/control, bidi, backtick, and HTML-delimiter characters. The private artifact under files/ keeps the exact selected filename.

--max-files applies to explicit files and diff paths. --max-bytes applies to the final UTF-8 packet.md, including framing and path labels. Reads stop at the configured bound, and explicit binary or non-UTF-8 files are rejected.

--preflight-timeout defaults to 30 seconds. One monotonic absolute deadline is shared by real-fd question stdin, worktree discovery, diff name-status, diff content, and packet-local git init; each Git call also keeps its existing 30-second cap. A supplied positive value is used exactly. Regular file reads and CPU redaction are bounded by size but are not forcibly preempted by this timer.

After normal redaction, verification also scans a detection-only Unicode shadow. NFKC-compatible characters, format controls, equivalent dots and dashes, and Unicode decimal digits can expose obfuscated international email or phone candidates. Known token families, secret literals, URL userinfo, and PEM headers are checked against the same shadow; canonical dotted Korean mobile numbers are scrubbed and mixed-separator forms fail closed. The packet text is never normalized or rewritten from this shadow; a candidate fails closed instead. Ambiguous Unicode matrix expressions with an unrecognized ASCII attribute-like suffix remain allowed to reduce code false positives, so this is still a denylist rather than a no-leak guarantee.

If --timeout is omitted, launch providers use the final packet size: up to 64 KiB gets 1200 seconds, up to 128 KiB gets 1500 seconds, and larger packets get 1800 seconds. A supplied --timeout is used exactly without clamping. The larger defaults do not delay successful calls; they only postpone failure for a real hang, which can still be interrupted with Ctrl+C. CI and unattended runs should set an explicit timeout. Paste and dry-run receipts show the resolved value as informational, but no provider deadline is applied.

Stated limits

Every success surface states its own limits. receipt and inspect summaries carry a fixed guarantees object — leakage: not-guaranteed, vendor_training: not-restricted, vendor_local_copy: uncontrolled, cwd_sandbox: none, redaction: denylist, doctor: help-text-only, policy_gate: lexical-tripwire — and the human receipt line ends with guarantees=leakage:not-guaranteed,cwd_sandbox:none,redaction:denylist.

These are code constants, not computed results. The disclaimer keys therefore cannot drift into a promise. The three keys that assert a mechanism exists (redaction, doctor, policy_gate) are additionally pinned to real behavior by tests, because a constant that outlives its mechanism would be a machine-readable falsehood.

This list is not exhaustive. It names the limits that are most often misread, not every risk. The failure envelope is unchanged and still carries only a fixed code, kind, and message.

The receipt line is an append-only token sequence. Parse it by whitespace and key=value; do not anchor a regex to the end of the line.

Disclosure surface

The design says the user picks the packet. When a skill drives this CLI, the agent picks --files. The scope flags only stop "the whole tree by accident"; they do not stop "256 KiB the agent chose".

Commit a .packet-ask-surface file at the worktree root listing the path prefixes this repository may disclose:

# what this repository may send to a SUB
src
docs/public

With that file present, an explicit --files / --include-files path outside the declared prefixes is rejected with exit 11 before any vendor starts. Without the file, nothing changes. Matching is by path component, so src does not open srcret/. Absolute paths, .., globs, control characters, a symlinked declaration, and an empty declaration are all rejected.

--outside-surface overrides the check for one run, and the receipt, inspect summary, and ledger all record surface: overridden instead of enforced.

Diff paths are checked too. --diff <ref> can reach history without touching the worktree at all, so exempting diffs would leave a channel that changes nothing a reviewer would see.

What it does not do

This is not a leak-prevention allowlist and it is not a sandbox. Its only mechanism is that widening the scope requires editing a committed file, so the edit shows up in git status or as a new commit and lands in the review you already do.

• A declaration is about paths, not contents. Declaring src does not mean src holds no secrets; the redaction denylist still applies and still is a denylist.
• A hard link inside a declared prefix that points at a file outside it is accepted, because a hard link is the file and there is no original to prefer. Creating one is itself a visible worktree change.
• Content injected into an ordinary diff is not caught. The edit is visible, but far less salient than a change to the declaration file.
• A malformed declaration fails closed and --outside-surface does not bypass it. Fix the file.

Egress ledger

The receipt goes to stderr once and is gone with the scrollback. When a skill drives this CLI, the agent picks --files, so there is no surface left for a human to ask what actually went out.

Set PACKET_ASK_LEDGER to an absolute path and every task run appends one JSON line before the vendor starts. The line records a run that reached the point of egress, not a confirmed delivery — a vendor that fails afterwards still leaves an entry, which is the safe direction for an audit surface. Each line holds: timestamp, mode, provider, selector, relative paths, bytes, packet digest, redaction counts, and the resolved timeout. The question and the file bodies are never written.

The path must be absolute, must not be inside the git worktree, must not be a symlink, and must be owned by the current user. The worktree check compares device and inode, not path strings, so a case-insensitive filesystem does not bypass it. The file is opened O_APPEND, O_NOFOLLOW, and O_NONBLOCK, and its mode is forced to 0600 before the first write even if the file already existed. If the entry cannot be written, the vendor does not run and the command exits 13. A ledger that silently skips entries is worse than none. Leave the variable unset to keep the feature off.

Usage

packet-ask providers
packet-ask credentials status

# Store through the interactive macOS Keychain prompt; no key in argv/history
packet-ask credentials set glm --store macos-keychain --access command

# Question on stdin; it stays out of argv and the process table
packet-ask review --provider paste --files src/app.py --question-stdin <<'EOF'
Find race conditions in this code
EOF

# Packet only; do not launch a vendor
packet-ask review --provider paste --files src/app.py --question "Find race conditions in this code"
packet-ask review --provider paste --files src/app.py --json --question "Find race conditions in this code"

# Metadata only; no packet body, provider, or credential access
packet-ask inspect review --files src/app.py --question "Find race conditions"
packet-ask inspect review --diff HEAD --json --question "Review this change"
packet-ask inspect review --diff HEAD --breakdown --json --question "Size this packet"

# Increase only the local stdin/Git preflight budget; provider timeout is separate
packet-ask inspect review --diff HEAD --preflight-timeout 60 --question "Review this change"

# GLM. auto = dedicated env first, then packet-ask-glm in macOS Keychain
packet-ask review --provider glm --credential-source auto --diff HEAD --question "Review this change"

# Optional non-sensitive heartbeat every 30 seconds during provider launch
packet-ask review --provider glm --diff HEAD --progress --question "Review this change"

# Uncommitted working-tree diff. review without a scope flag is rejected
packet-ask review --provider paste --unstaged --question "Review this change"

# Anthropic Claude SUB. Key: PACKET_ASK_CLAUDE_KEY. Parent BASE_URL is unchanged
packet-ask review --provider claude --files src/app.py --question "Review this code"

# Kimi. Key: PACKET_ASK_KIMI_KEY
packet-ask review --provider kimi --files src/app.py --question "Review this code"

# grok/agy still paste; they do not run a no-tools one-shot yet
packet-ask review --provider grok --files src/app.py --question "Review this code"

# Research. Local files are off by default
packet-ask research --provider paste --question "What usually breaks in a Tailwind v4 migration?"

packet-ask doctor

Kimi is official kimi --quiet one-shot. It does not open an interactive session. It refuses to run without a resolved dedicated Kimi credential. Tools are disabled with a tools: [] agent file and a non-matching [tools] enabled list. KIMI_CODE_HOME is only the isolated profile ~/.config/packet-ask/providers/kimi/kimi-code. Do not run kimi in the real repo.

Kimi session cleanup must succeed before successful output is returned. If a provider, output-guard, or signal failure already exists, a simultaneous session cleanup failure is reported as a fixed non-sensitive warning and never replaces the original exception or exit status.

Kimi runs sharing the isolated KIMI_CODE_HOME are serialized by a private, non-inheritable advisory lock held through config creation, provider execution, and session cleanup. A second run that cannot acquire it within 30 seconds fails before touching the shared profile or launching a vendor.

GLM uses the official claude binary. It does not change the parent shell ANTHROPIC_BASE_URL. Only the child environment gets the Z.ai Claude Code endpoint and the resolved dedicated GLM credential. GLM and Claude use Claude Code's documented --bare and --tools "", plus an inline empty --mcp-config with --strict-mcp-config; the child also disables claude.ai MCP servers. Child environments set CLAUDE_CODE_DISABLE_AUTO_MEMORY, CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC, and DISABLE_ERROR_REPORTING. That reduces tool/config and local-session exposure. It does not prove an OS sandbox or that the vendor stores nothing.

Task commands default to --credential-source auto: the dedicated environment variable wins, then the canonical macOS Keychain item is tried. env, keychain, and prompt select exactly one source and never silently fall back. prompt requires an interactive terminal and never persists the value. Status checks Keychain item existence without retrieving its password. Resolved keys from every source are included in raw and terminal-normalized output guards. Task-time reads use fixed non-sensitive messages to distinguish a missing item, an inaccessible item, a timeout, an invalid value, and an indeterminate local read failure; JSON errors and code-level classification remain generic. These sources are selected through an immutable builtin backend registry; auto contains only env then keychain. There is no user backend registration, arbitrary command, key-file, or third-party settings adapter.

On success, stderr prints a receipt before launch (packet-ask receipt …) and millisecond phase times after (packet-ask timing …). --json adds a timing object. Neither line contains keys. Receipt paths are JSON escaped, and terminal control sequences are removed from untrusted provider output before it is printed. Explicit --progress adds only packet-ask progress phase=launch elapsed_ms=… to stderr every 30 seconds while the provider call is active. It is off by default, contains no provider/path/key/body data, and stops before final timing or success output.

With --json, argparse and runtime failures also return one packet-ask.v1 stdout object with ok: false and stable error.code, error.kind, and a generic English error.message. Raw argv, exception text, paths, keys, and tracebacks are excluded. The process exit code is unchanged. Without --json, the existing human stderr behavior remains unchanged.

Receipt JSON adds timeout_seconds, timeout_source (auto or explicit), and timeout_applies. The packet-ask.v1 schema is additive; consumers should ignore unknown receipt keys. The four-key millisecond timing object is unchanged.

Packet temp dirs live in the OS cache, not the git worktree. cwd is not a sandbox. A PACKET_ASK_CACHE_DIR inside the worktree is rejected. Every new packet holds a private lease; a later run removes packet data only when that lease is unlocked and at least 24 hours old. Active, fresh, symlinked, non-private, and legacy directories without a lease are not reaped. .gitignore entries for .packet-ask-tmp/ and packet.md only stop leftover files from being committed.

Every Git subprocess uses the same bounded process-group runner. Worktree discovery, diff collection, and packet-local git init share a deadline and byte limits. Ctrl+C, SIGTERM, and SIGHUP terminate registered Git/provider groups and run packet cleanup before propagating. Successful stdout is emitted only after packet cleanup succeeds. Packet payload bytes and digest, plus unchanged user provider overlays, are reused in-process to avoid repeated reads, hashes, and TOML parses.

User config ~/.config/packet-ask/providers.toml adds paste aliases only. It does not accept executables, argv, env, adapter IDs, launchers, probes, or registration hooks. Builtin launch dispatch and doctor probe kinds come from an immutable code registry. Alias labels and notes are bounded and reject terminal, bidi, and line/paragraph control characters before either human or JSON output. ZWNJ and ZWJ remain allowed for normal language and emoji sequences.

The implementation/incident question gate is a conservative lexical check, not a proof of intent. Launch adapters disable vendor tools and use the packet as the child cwd, but this is not OS-level filesystem confinement.

version = 1
[providers.gemini]
label = "Gemini CLI"

Skills

packet-ask install-skills installs into harness homes. The skill only tells MAIN to call packet-ask. Packet selection and vendor-tool disabling are enforced by the CLI; they are not an OS sandbox.

Exit codes

10–14 mean the vendor process was never started. Task termination preserves the conventional signal exit status: SIGHUP is 129, SIGINT is 130, and SIGTERM is 143.

Development

uv sync --group dev
uv run pytest

The current confinement hardening rationale is in docs/hardening.md. Runtime/process and hot-path decisions are in docs/runtime-hardening.md.

See CONTRIBUTING.md.

License

MIT Copyright (c) 2026 Coden