c53e9c90db
Review fix (ds-review-bot critical #2 on #623): the first-turn event stamp had a durability hole no turn anchoring can close — an idle SessionStart- style injection persists a complete one-shot turn before any prompt turn opens, so a crash in that window left a resumable-looking child with no inherited policy, falling back to a possibly wider deployment default. The captured overrides now ride the child's creation meta into its immutable SessionHeader (sandboxMode/approvalPolicy, neutral strings at the session boundary — the delegationDepth precedent), durable from the moment the session exists: no listener ordering can starve the baseline and no crash window can lose it. overrideOf(session) on both policy services resolves fold(events past header.seedLength) ?? header baseline, validating against the closed vocabulary on read; stampOverride and the prompt-submit listener machinery are deleted. The header field rides both persistence backends (JSONL header line; SQLite sessions columns, SCHEMA_VERSION 11 — pre-release, no migration). pty-local reads through overrideOf so PTY spawns see the baseline too. Red-first: header-durability-before-any-turn test (the injection crash window shape), baseline/seed-boundary/closed-vocabulary contract tests in both service suites; the real-wall suite (race, veto, fork stale-seed, grandchild) re-anchored on header assertions and green. The Agent Note's Alternatives now records the superseded event-stamping iteration with the review evidence; bilingual docs updated.
DeepSeek Harness
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DeepSeek Harness (dsh) is an open-source coding agent built on the DeepSeek Harness SDK.
It uses an architecture where everything is a plugin.
Install
Install dsh with one command:
curl -fsSL https://raw.githubusercontent.com/deepseek-harness/deepseek-harness/master/scripts/install.sh | sh
The installer requires git and Node ^22.19 || >=24, offers to install pnpm when it is missing, and prompts for a DeepSeek API key.
The installer clones DeepSeek Harness to ~/.dsh/source, links dsh into ~/.local/bin, and launches it. Re-running the command updates the checkout. See scripts/install.sh for alternate install locations and other options.
Use DeepSeek Harness
Web UI
For the recommended local interface, build the frontend after installation and after each update, then start the Web UI:
pnpm --dir ~/.dsh/source run build && pnpm --dir ~/.dsh/source run build:web
dsh web
The Web UI is served at http://127.0.0.1:3080 by default.
TUI
Start the full-screen terminal interface:
dsh
Headless
Run one task, print the final answer, and exit:
dsh -p "summarize this workspace"
Why DeepSeek Harness
Built-in capabilities cover file reading, editing, and search; shell execution; reusable skills; task tracking; subagents and workflows; persistent sessions; and context compaction. The TUI also includes Plan Mode.
- Everything is a plugin. Models, tools, policies, storage, context management, and interfaces are composable Cordis plugins, so deployments can extend or replace behavior without forking the agent loop. See the architecture for the underlying design.
- Code Mode (opt-in). It exposes a
run_codetool and a generated TypeScript SDK; only program output re-enters model context. See Code Mode. - Self-referential Cordis tools are opt-in. They let the agent inspect its live runtime and mount or unmount plugins while it runs. See the Cordis tools.
Community
Follow DeepSeek Harness on Twitter for project updates.
Development
pnpm install
pnpm run test:coverage
Start with the development guide and read the architecture before changing packages.
For agents, follow AGENTS.md.
DeepSeek Harness is currently pre-release.