dsh-airbag

Non-intrusive safety belt for DeepSeek Harness: blocks API keys pasted to the agent, tracks leak events, blocks secret writes, and offers a first-run workspace health scan.

DeepSeek Harness 的非侵入式安全护栏：拦截粘贴给 Agent 的 API 密钥、追踪泄露事件、拦截密钥写入，并提供首次工作区安全体检。

Features

• Paste guard (A1) — pasting a secret (DeepSeek / OpenAI / Anthropic keys, AWS, GitHub PATs, JWT, PEM private-key blocks, Aliyun / Tencent Cloud AccessKeys, and 45+ built-in patterns) into the composer is blocked, redacted, or warned per your settings. The decision happens synchronously inside the paste event; nothing is ever sent to the model.
• Write guard (A2) — model write-direction tool calls (write / edit / bash / run_code) whose arguments carry a secret are denied (hard block) or routed through the native approval seam (ask) — the confirmation stays in the harness UI, never a bypass.
• Approval-fatigue insights (B) — a passive observer on the native approval waterfall: it never decides, but it measures asked→decided timing and flags blind approvals (granted in under 2s — rubber-stamping) and fatigue episodes (30 minutes of dense, near-universal grants). Insights land in the event feed as ordinary records.
• Corner notification center (G1) — four non-intrusive levels: L0 silent, L1 badge only, L2 corner toast (auto-dismisses, no sound, no focus steal), L3 persistent badge. Events collapse under the same 5-minute window; a global do-not-disturb switch hides everything.
• First-run health scan (G6) — read-only scan of a workspace for .env files, credential files, embedded secrets, and git remote credentials. Reports masked fragments only.
• Privacy by construction — plaintext secrets never touch disk, logs, or telemetry: only masked fragments (sk-0***cdef) and SHA-256 prefixes are persisted, under ~/.dsh/airbag/.

Install

Pick any of the three methods below, then restart DSH Web. A 🛡️ Airbag button appears in the bottom-right corner (with a badge on first run — that's the health-scan invitation).

Method 1: From npm (recommended)

dsh plugin --profile web add dsh-airbag

Method 2: From a tarball

dsh plugin --profile web add ./dsh-airbag-0.4.2.tgz

Method 3: From GitHub

dsh plugin --profile web add github:uwu9039/dsh-airbag#<commit-sha>

A GitHub install fetches source, not built artifacts: pnpm runs the prepare script (tsdown) to build on install. pnpm ≥10 refuses to run a git dependency's build script until it is explicitly allowed, so the first add fails — add the package to the profile's pnpm-workspace.yaml first, then re-run the command above:

# at ~/.dsh/profiles/<profile>/pnpm-workspace.yaml
allowBuilds:
  dsh-airbag: true

To uninstall: dsh plugin --profile web remove dsh-airbag.

Usage

Click the 🛡️ button to open the panel with three tabs:

| Tab | What it does | |---|---| | 拦截记录 (Events) | Today's interceptions: time, category, action, masked fragment; clear history | | 体检 (Scan) | Enter a workspace path and run the read-only health scan | | 设置 (Settings) | Default action (block/redact/warn), per-event notice levels (L0–L4), do-not-disturb, sound, whitelist, custom regex rules (rules.yaml) |

All notice levels and dispositions are configured only in the settings tab — notifications never offer in-place toggles.

Custom rules live in ~/.dsh/airbag/rules.yaml (YAML list):

- pattern: 'INT_[A-Z0-9]{12}'
  label: 内网 Token
  action: block
  severity: high
  notice: 3

Configuration

The plugin accepts a config block in your cordis.yml row (all optional):

- id: airbag
  name: dsh-airbag
  config:
    dataDir: ~/.dsh/airbag        # where events/config/rules live
    defaultAction: block          # block | redact | warn
    maxPasteBytes: 10240          # max pasted bytes scanned
    maxScanFileBytes: 262144      # per-file scan cap
    maxScanFiles: 200             # files content-scanned per health scan

Development

Requirements: Node.js ^22.19 || >=24, pnpm.

pnpm install
pnpm run typecheck
pnpm test
pnpm run build
pnpm pack    # produces dsh-airbag-0.4.2.tgz

Smoke-test a local checkout:

pnpm run build
dsh plugin --profile web add ./dsh-airbag-0.4.2.tgz
dsh --profile web

Architecture

src/index.ts             Host plugin entry: event store, settings file, scan, A2 write guard, HTTP API
src/rules.ts             Pure secret-detection engine (45+ built-in patterns, custom rules, whitelist)
src/store.ts             Append-only JSONL event store
src/config.ts            Deployment Config schema + user settings file (config.json / rules.yaml)
src/scan.ts              Read-only workspace health scan
src/write-guard.ts       A2 write-direction decision engine (pre-execute payload scanning)
src/approval-insight.ts  B approval-fatigue observer (blind-burst / fatigue detection, pure logic)
src/routes.ts            /dsh-airbag/api/* HTTP routes (web profiles only, via ctx.inject(['webServer']))
src/client/index.ts      Web client entry: mounts paste guard + notification center + panel
src/client/paste-guard.ts  A1 paste interception (composer-scoped, synchronous decision)
src/client/notify.ts     G1 corner notification center (4 levels, aggregation, DND)
src/client/panel.ts      Panel UI (events / scan / settings)

The host communicates with the browser half through the same-origin /dsh-airbag/api/* routes — no extra RPC surface. The A2 write guard listens on the official tools/pre-execute waterfall and returns deny / ask decisions; the browser half polls the event API every 30s so host-side interceptions surface as badge updates.

Non-goals

• Reading-direction redaction is intentionally left to dsh-guardian.
• The write time-machine (C — pre-write snapshots and one-click rollback) is planned for a later milestone.
• The plugin never replaces the native approval seam — every decision stays with you.

License

MIT