Tacit

Learns what you leave unsaid in your prompts — and tells the agent for you.
A plugin for DeepSeek Harness.

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You keep writing prompts the way you already do. Tacit watches how each turn actually went — retries, tool errors, and above all the message you send when the agent got it wrong — and turns your habits into a few directives the agent follows in every new session. No clicks, about $0.001 per lesson.

you:    "make the login page better"
agent:  …stumbles…
you:    "no, I meant the Next.js app under apps/web"

Tacit:  learns → "The user often omits which app they mean — check apps/web first."
        injects it into every later session's system prompt.
        You never have to say it again.

Install — 30 seconds

dsh plugin --profile web add dsh-tacit

Restart dsh web, refresh the page. Optional kick-start: Settings → Tacit → Learn from my last 20 turns (≈ $0.02, once).

Requires DeepSeek Harness >= 0.1.1-rc.1, Node >= 22, and a DeepSeek API key already configured in the harness (Tacit never reads it).

What you get

• Zero-click learning — messy turns and your own corrections are analyzed in the background, with the previous turn as context. Capped per day (30 by default). ≈ $0.001 per analysis.
• Directives that earn their place — learned directives are injected as a small system-prompt section you can read, edit, toggle or delete. A new one starts as a candidate and is retired automatically if your messy-turn rate gets worse. free
• ✨ Improve — a composer button that rewrites your current draft using what Tacit has learned, with a before/after preview and 👍/👎. ≈ $0.001 per click
• Measured, not guessed — Settings shows your real trend: messy-turn rate and tokens per turn, first 20 turns vs. latest 20. free

How it works

1. A pure fold over the session's events produces a bounded digest per turn.
2. When a turn ends messy, or your next message reads as a correction, one small deepseek-v4-flash call (low reasoning effort, structured output) analyzes the prompt.
3. Every few analyses, one more call distills the findings into 2–4 directives.
4. The directives are rendered as a ≤300-token section of the system prompt — the exact text is visible in Settings, and nothing else about your prompts leaves the machine.

Privacy & cost, in one paragraph

Tacit never sees your API key (every call goes through the harness's own model service), only calls the allowlisted official model, keeps reports and directives in ~/.dsh/storages/tacit/, refuses cross-site requests to its own routes, and never deletes anything but its own reports. The dollar figures are estimates at list price; a cost plugin such as dsh-cost-meter shows the real number. Full details, including the honest list of limitations: docs/privacy-and-cost.md.

More

Configuration · Privacy, cost & limitations · Architecture · Contributing · Changelog

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