Strip the noise
from every shell command
before it hits the model.

$ curl -fsSL https://tok0.dev/install.sh | sh

RANGE: 1.000 TOKS — 801.000 TOKS RANGE: 1.000 TOKS — 801.000 TOKS

[ SYSTEM LOG ]
 # INIT............... OK 
 # SIGNAL LOCK........ STABLE 
 # FIELD RELAY........ CONNECTED 
 # AI OPS HANDSHAKE... COMPLETE 
 # FWD LINK 02........ ONLINE 

CURRENT SAVINGS:

300.733

TOKENS

TOK0 | CLI COMPRESSION PROXY

01 / 05 FIELD TELEMETRY

Live numbers from the
field — not marketing.

Every tok0 instance reports anonymous compression metrics back to api.tok0.dev. The four numbers below are the real, current state of the deployed fleet — refreshed on every page load.

01 · Tokens compressed

9.96M

Cumulative · all tracked instances

02 · Avg. savings

70.4%

Across every wrapped command

03 · Active instances

14

Reporting in last 10 days

04 · Commands run · 30 d

9,609

15 day rolling window

● Live · api.tok0.dev/statsGENERATED · 2026-05-03 23:25:56 UTC

[ 30-DAY SAVED TOKENS ] 15 POINTS · 8.92M TOTAL

2026-04-18 2026-05-03

Top commands · by tokens saved

npm install 13,395 runs

17.25M
git log 12,688 runs

16.70M
git diff 14,497 runs

16.64M
cargo build 9,870 runs

12.57M
docker build 8,817 runs

10.99M
pnpm install 8,084 runs

10.19M

SOURCE · D1 · command_stats /stats

[ FLEET BREAKDOWN ] 14 INSTANCES

By operating system

macos-aarch64 5 · 36%
linux-x86_64 5 · 36%
linux-aarch64 2 · 14%
windows-x86_64 1 · 7%
macos-x86_64 1 · 7%

By country

US 4 AU 1 BR 1 DE 1 FR 1 GB 1

By version

v0.4.2 9 v0.4.1 2 v0.1.1 2 v0.4.0 1

SOURCE · D2 · instances LIVE

02 / 05 SYSTEM SPECIFICATION

Built like a piece
of infrastructure.

Six non-negotiables. Each one is a CI gate, not a marketing claim.

01 FEATURE

Single static binary, no runtime.

Pure Rust, single-threaded by design. Zero tokio, zero async-std. Cold start under 5 ms — every shell call stays cheap.

RUST · 8 MB

02 FEATURE

Deterministic compression pipeline.

Strip ANSI · pattern replace · output match · line select · truncate · head/tail window · hard cap · empty fallback. Pure functions, fully testable.

8-STAGE PIPELINE

03 FEATURE

Declarative rules, embedded at build.

100+ built-in TOML compression rules across git, cargo, npm, docker, kubectl, terraform, pytest, and more — each with min-savings assertions baked into CI.

100+ TOML RULES

04 FEATURE

Auto-installs into your agent.

tok0 init detects Claude Code, Cursor, Gemini CLI, Windsurf, Cline, Amp, OpenCode, Codex, Kimi Code — drops the right hook or rule file in the right place.

9 AI TOOLS

05 FEATURE

Never blocks your terminal.

If a filter errors, tok0 passes through the raw command output unchanged. Exit codes propagate exactly. Your CI never breaks because of compression.

FALLBACK SAFE

06 FEATURE

Telemetry stays on your machine.

SQLite token meter at ~/.config/tok0. No account, no API key, no upload by default. Cloud feature is gated and opt-in only.

LOCAL-FIRST

03 / 05 COMPATIBLE SYSTEMS

Drops into the
agent you already use.

One tok0 init auto-detects every supported AI tool on your machine and installs the right hook, rule file, or AGENTS.md entry. Manual escape hatch for the GUI-only ones.

[ AI TOOLS ] 9 SUPPORTED · 7 AUTO-INSTALL

Claude Code Auto-install

PreToolUse hook
~/.claude/settings.json
Cursor Paste-in

rules file paste-in
Settings → Rules
Gemini CLI Auto-install

auto-loaded instructions
~/.gemini/GEMINI.md
Windsurf Auto-install

global rules file
~/.codeium/windsurf/memories/…
Cline Auto-install

Cline Rules toggle
~/Documents/Cline/Rules/tok0.md
Amp Auto-install

AGENTS.md auto-load
~/.config/amp/AGENTS.md
OpenCode Auto-install

AGENTS.md auto-load
~/.config/opencode/AGENTS.md
Codex Manual

AGENTS.md (manual)
~/.codex/AGENTS.md
Kimi Code Paste-in

manual paste-in
~/.kimi/tok0.md

SOURCE · /bridge/setup.rs tok0 init

[ COMMANDS COMPRESSED ] 250+ TOTAL · CI-VERIFIED FLOORS

tok0 ships 100+ TOML compression rules and 52 native Rust compressors covering git, package managers, build tools, container/cloud CLIs, linters, test runners, and database clients. Floor savings shown below are CI-asserted minimums — real-world numbers run higher.

Pipeline 8 stages · pure functions · deterministic
Floors CI-asserted ≥ 60% per command
Latency < 5 ms cold start · zero async runtime
Coverage git · cargo · npm · docker · kubectl · pytest · +244

git diff −83% git log −78% cargo build −72% cargo test −68% cargo clippy −74% npm install −80% pnpm install −81% bun install −79% tsc −66% vitest −71% next build −70% docker build −84% kubectl get −69% terraform plan −77% pytest −73% ruff check −65% go build −67% gradle build −76% aws s3 ls −72% gh pr list −68% brew install −85% apt install −82% + 228 MORE

SOURCE · rules/*.toml + compressors/ Active rules

04 / 05 OPERATIONAL MANIFEST

Rules of engagement.

01 Wraps any CLI Zero config
02 Strips ANSI / banners Deterministic
03 Preserves exit codes Always
04 Falls back on filter error Never blocks
05 Open source MIT
06 No account required Local-first

[ SYSTEM LOG ] tok0 status

$ tok0 status # INIT...................OK # BRIDGE HOOK............CONNECTED · claude-code # RULES CACHE............WARM · 100 rules · 12 ms # METER..................ACTIVE · 1,247 ops today # TELEMETRY..............LOCAL · ~/.config/tok0/db # EXIT CODE PROPAGATION..VERIFIED # FALLBACK SAFETY........ARMED — ready —

FIELD SPEC · TOK0/0.1.1 ALL SYSTEMS NOMINAL

05 / 05 READY IN 12 SECONDS

Stop paying
for tokens
you never needed.

One install. tok0 auto-detects your AI tool, installs the right hook, and starts compressing every command your agent runs. No flags, no config, no account.