Tacit

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

中文

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 conversation. No clicks, $0.001–0.003 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 conversation's system prompt.
        You never have to say it again.

Install — 30 seconds

npx @deepseek-ai/dsh plugin --profile web add dsh-tacit

If dsh is already installed globally, dsh plugin --profile web add dsh-tacit
is the equivalent shorthand.

Start (or restart) with npx @deepseek-ai/dsh web, then refresh the page.
Optional kick-start: Settings → Tacit →
Learn from my last 20 turns (≈ $0.02–0.05, 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

_{Settings → Tacit with Overview and Usage expanded, captured from a clean local profile seeded with synthetic runs and directives.}

How it works

1. Tacit keeps a small, bounded digest of every turn: the prompt, what tools ran,
   what went wrong, how it ended.
2. When a turn ends messy, or your next message reads as a correction, one small
   deepseek-v4-flash call analyzes that prompt and records what was missing.
3. Every few analyses, one more call distills the findings into 1–4 one-sentence
   directives for the agent. Each new directive is on trial for 10 turns.
4. The directives become a ~300-token section of the system prompt in every new
   conversation. The exact text is visible in Settings; only clipped digests of
   your turns ever leave the machine.

The full walkthrough with every number and a diagram:
How it works.

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 models over your session's own
provider route, keeps reports and directives in ~/.dsh/storages/tacit/, refuses
cross-site requests to its own routes, and never deletes anything but its own
reports and expired usage files. Credential-shaped strings in what it captures —
API keys, tokens, JWTs, private-key blocks — are masked before anything is
stored or sent. Dollar figures are estimates at list price; a cost plugin such as
dsh-cost-meter shows the real number. The full data-flow and cost tables, and
the honest list of limitations:
Privacy, cost & limitations.

Help shape Tacit

Tacit works and I use it every day — but so far it has learned from one
person's prompts. It gets better with more of them.

• Try it and say what feels wrong. A directive that misfires, a cost that
  surprised you, a label that reads oddly:
  open an issue.
  Two minutes of your time beats a week of my guessing.
• Pick up a task. Issues tagged
  good first issue
  are small and come with acceptance criteria;
  help wanted
  ones are bigger and I will pair on the design.
• Ask anything in
  Discussions.

PRs are welcome — the fork → branch → PR walkthrough is in
CONTRIBUTING.md.
No API key is needed to run the tests.

Documentation

MIT © hackernotfound