open source ยท frontier harness ยท 43 exclusives

The frontier AI harness that has a personality and lets you vibecode from bed.

Overkill remembers you, learns your style, reaches you on every platform you use, and calls you out when you're about to ship something dumb at 2am.

$curl -fsSL https://overkill.my/install | sh
detected your machine ยท MIT / Apache-2.0
overkill ~/dev/atlas-api:main LIVE REPLAY
43exclusive features no competitor has
10messaging gateways
104+LLM providers auto-discovered
0telemetry calls. ever.
01what makes it different

Most coding agents are ChatGPT with a shell. We're not playing that game.

/01

It remembers you. Actually.

Not session state, real memory. It tracks how you work, your beats, the time you rage-typed a commit message in all caps. The longer you use it, the better it knows how to work with you. Two-layer personality model: knows the difference between "he's always like this" and "he's having a week."

It remembers you shipped that bug last Tuesday. It will mention it. Out loud. In front of nobody, thankfully.
/02

It has a personality. You just talk to it.

No soul file, no system prompt engineering. Just talk to it and it gets your vibe, direct when you're in flow, dry about failures, quiet when you're heads-down. A colleague, not a servant. Memo the elephant shows up when it's thinking. It cracks jokes. It has fun facts.

Tell it how you want it to behave. It'll actually do it. No 600-word config that gets ignored by turn three. Meet Memo โ†’
/03

It reaches you everywhere.

Telegram, Slack, Discord, WhatsApp, Signal, Matrix, Mattermost, Feishu. Start a task in the terminal, get the update on your phone, approve the deploy from a grocery store line. One agent, one session, any surface.

The agent doesn't care how you talk to it. It just shows up where you are.
/04

It's not afraid to say no.

Three walls of quality gates. Ouroboros red-teams your code. The architecture wall catches drift. At 11:48pm, it refuses to push auth changes without asking. A coding partner, not a yes-man.

"I don't push auth changes late at night without asking." An agent with boundaries.
02see it in action

No narration. Just a real session, with personality.

It boots, remembers where you left off, cracks a joke, takes an order from your phone, hits a wall, and ships, without you babysitting it.

overkill ~/dev/atlas-api:main โ— 1 LSP REPLAY
03only in overkill

25 features no other coding harness has.

We audited 12 codebases across 405 features. 43 are genuine exclusives. Not "we do it better", "nobody else does it at all."

๐Ÿง 

Situational Awareness

Pre-action reflection classifies content type, checks your context, inventories available tools, and picks the best modality, TTS for dense research, minimal text for mobile, structured diffs for code. No agent on the market does this.

๐Ÿ˜

Memo Thinking Engine

Context-matched thinking phrases with a personality. Not "thinking...", Memo the elephant says "Digging through your old commits for clues" or "Weighing two options, one's spicy." Fun module ships with jokes, Easter eggs, and movie quotes.

๐Ÿ”€

Cross-Channel Continuity

Start in the terminal, continue on Telegram, approve on your phone. Same session, same context, same agent. No other harness does this without losing state.

๐Ÿ›ก๏ธ

3 Walls Quality Gates

Ouroboros red-teams your code. Architecture wall catches drift. Test quality wall builds a regression bank. Every shipped bug becomes a permanent test. Same bug structurally cannot re-ship.

๐Ÿ’พ

Dual-State Memory

LCM-inspired hierarchical DAG with hot/cold paging. Three-level escalation guarantees convergence. Postgres/pgvector with GPU-accelerated embeddings. Your 20-year colleague never forgets.

๐Ÿ”Œ

104+ Provider Auto-Discovery

Factory auto-discovers every OpenAI-compatible provider from the models.dev catalog. Smart routing picks the cheapest capable model per task. Family-aware failover. No hardcoded model names.

See all 43 exclusives โ†’
04install in 10 seconds

One line. Then it asks you the questions.

$ curl -fsSL https://overkill.my/install | sh
$curl -fsSL https://overkill.my/install | sh
# one command. downloads binary + clones repo + sets up TUI.
$curl -fsSL https://overkill.my/install | sh
# same install script โ€” run it inside WSL. native Windows not supported.
$git clone https://github.com/Sahaj-Tech-ltd/overkill && cd overkill
$cd tui && npm install && cd ..
$go build -o overkill ./cmd/overkill
# for contributors. read it first โ€” that's the whole point.

First launch runs an onboarding wizard. Pick a provider, paste a key, pick a theme, start talking. It learns your vibe from how you talk to it. Done in under a minute.

05bring your own brain
OpenAIGPT-5.5
AnthropicClaude Opus 4.8
GoogleGemini 3.5 Flash
AWSbedrock
DeepSeekV4 Pro
xAIGrok 4.3
MistralMedium 3.5
+ 97 more auto-discovered
06the gateway

Start a task in the terminal. Get the result on your phone.

Telegram
start a task, get the diff on your phone.
/01
Slack
a thread per task. react to approve.
/02
Discord
your server, your agent.
/03
WhatsApp
push to prod from the grocery line.
/04
Signal
for when it's serious.
/05
Matrix
self-hosted. your keys, your rules.
/06
Mattermost
your team's platform. zero friction.
/07
Feishu
Lark/Feishu native. docs + chat.
/08
iMessage
blue bubbles, real commits.
/09
SMS
Twilio bridge. works on a flip phone.
/10
07open source

The only frontier coding harness that's fully open source.

Amp Code? Closed. Claude Code? Closed. Overkill is MIT/Apache-2.0. Read every line. Fork it. Ship it as your own. No black box, no telemetry you didn't ask for, no "contact sales." It's a binary, a config file, and you.

43 exclusive features. 10 gateways. 104+ providers. 100K+ lines of Go + TypeScript + Python. One repo. All yours.

MITApache-2.0
View on GitHub โ†’
43
exclusive features
10
messaging gateways
104+
LLM providers
0
telemetry calls. ever.