dsh-teacher 🧑‍🏫

A DeepSeek Harness plugin that turns the agent into a teacher — never answers, always asks.

Give it a markdown file of questions. It leads you to the answers with the Socratic method, keeps a quiet ledger of the gaps it notices in your reasoning, and retests those gaps on-demand on a spaced-repetition schedule.

The loop

questions.md ──▶  /teach questions.md
                      │  LLM parse / tolerant parser
                      ▼
        SQLite question store (courses + questions + quiz runs)
                      │  /quiz → 📝 LLM-free quiz popup (MCQ / free-text)
                      ▼
            answers ──▶ POST /dsh-teacher/quiz/submit (run stored)
                      │  "Quiz finished (run N)" → LLM analysis
                      ▼
            grade each answer (vs hidden keys) ──▶ gaps → Socratic walk
                      │  gap ledger (persists across sessions, SQLite)
                      │  you: "/retest" (on-demand, anytime)
                      ▼
            "Explain rebase to me."  ──▶  graded, rescheduled (FSRS-5)

Status

v0.3.0 — core + Web client + SQLite question store + LLM-free quiz popup; tests passing (83/83).

Design decisions are in docs/PLAN.md (§10 = the v0.3 redesign).

Web client

Once the plugin is installed and the web profile restarted, the browser bundle (lib/client.js, registered via dsh.client) adds:

• Quiz cards — custom tool.call.toolview cards for next_question, grade_answer, note_gap, hint, and retest (question prompt, verdict color-coded by outcome, gap chips by kind).
• 🧑‍🏫 gaps button — in the session header action row, shows a due-count badge and opens the gap panel.
• Gap panel — floating overlay listing this session's gaps (kind, topic, due/✓ mastered), fed by the teacherGaps session projection (same seam dsh-usage-plugin uses). The durable cross-session ledger stays in /gaps and /retest.
• 📝 quiz popup — the LLM-free quiz: questions come from the teacherQuiz session projection (loaded from the SQLite store, no AI involved); each question shows clickable multiple-choice options when present, else a free-text box, with a 💡 hint toggle. Finish submits your answers to the plugin (POST /dsh-teacher/quiz/submit), then the teacher's LLM analysis grades them, records gaps, and walks you through the misses Socratically. Open it from the header button or /quiz.

Install

Requires DSH rc.6+ and Node ≥ 22.5 (uses built-in node:sqlite).

dsh plugin --profile web add "github:Yihong89/dsh-teacher"
# restart dsh --profile web

Usage

# questions.md  — answer keys live in HTML comments; the teacher grades
#                 against them internally and never shows them to you.
---
title: Networking review
---
## Q1: What happens when TCP handshake fails?
<!-- answer: SYN gets no SYN-ACK; the client retries then times out -->
### hints
<!-- hint 1: Think about the three-way handshake. -->

Teacher behavior (model tools)

• next_question — pulls one question at a time; the answer key never appears in tool output.
• import_curriculum — loads any markdown question file: read the raw file, extract each question + correct answer, emit them in the standard format. Used when the automatic parser can't make sense of a file's format. Loading a course does not start teaching — the teacher waits for your go-ahead. Every load persists the course into the SQLite question store.
• quiz — legacy quick-test mode over the whole bank; the v0.3 UI prefers the LLM-free quiz popup instead.
• analyze_quiz — post-quiz LLM analysis: pass the run id from the popup ("Quiz finished (run N)"), get the run's questions (hidden answer keys + hints) and the user's answers, grade each (correct/partial/wrong/no-answer), record gaps, and walk the misses Socratically; done: true marks the run analyzed.
• note_gap — records a gap (wrong | vague | missing | exposed) with the user's verbatim words + the knowledge point you identified; persisted to the ledger and the session log.
• grade_answer — grades against the hidden answer key; updates each open gap's FSRS schedule; correct marks gaps mastered.
• retest — returns due gaps; drill them one at a time, then grade_answer.
• summary — pulls the ledger for the end-of-session knowledge-point report.

Per the policy section (injected only while teacher mode is active): hard Socratic mode — never reveal the answer, one micro-question at a time; hints are generated by the teacher from the user's answers (escalating, never the answer); knowledge-lack fallback — the same micro-question fails twice or the user says "I don't know what X is" → explain the missing knowledge point concisely (definition

• example), never repeat the question a third time; "just tell me" → answer + record an exposed gap.

Input formats

The automatic parser is format-tolerant: it recognizes questions in many shapes (numbered items, Q1: items, ## Q<n>: headings), answer markers (→ **Answer:**, Answer:, 答案：, ✅/bold multiple-choice options, <!-- answer: --> comments), and hints (> **Key words:**, > **Trap:**, > 关键词：, comments). Questions that carry no answer/options/hints are treated as prose and skipped.

If a file still won't parse, tell the teacher "import this file" — it converts the file with import_curriculum (LLM-assisted) into the standard format. The markdown file supplies questions and answers; hints and knowledge points always come from the teacher's own generation, not from the file.

Why it exists

Chatbots explain at you; cognitive science says that's the least effective way to teach. Retrieval practice, spaced reviews, and making the student produce the answer (pretesting) beat passive reading — even when the first attempt is wrong. dsh-teacher builds that evidence into the DSH agent. See the landscape survey in docs/PLAN.md §1.

Development

npm test          # node:test — zero runtime deps beyond DSH itself

• lib/ — pure logic (curriculum parser, FSRS-5, grading, folding, ledger, gap projection, SQLite question store, quiz projection); fully unit-tested, no DSH imports.
• index.js — the Cordis host plugin (prompt section, commands, tools, session events, teacherGaps + teacherQuiz projections, the /dsh-teacher/quiz/submit route). Written in plain JS (no build step); imports @deepseek-ai/dsh-tools and zod at runtime, resolved from the DSH install / npm.
• lib/client.js — the Web client: a hand-rolled __ModuleLoader__ bundle (plain JS + React.createElement, no build step) declaring dsh.client in package.json and registered at the ./client exports subpath.
• Ledger location: $DSH_HOME/state/dsh-teacher/ledger.db (falls back to .json).
• Question store: $DSH_HOME/state/dsh-teacher/question-store.db (falls back to .json) — a single global pool of courses shared by every teacher session; the legacy v0.2 per-workspace JSON course files are imported once on first load.

License

MIT