dsh-session-export

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Session export & compliance archiving for DeepSeek Harness (dsh).

Turns any current or historical session into verifiable, sanitized archives in multiple formats, manages them on disk, and gives you a compliance/traffic view — all as a dependency-free dsh bundle.

Why

Exports are only useful for compliance or archival if they do not leak. This plugin combines, in one bundle:

• Deterministic redaction by default — API keys, tokens, JWTs, .env-style lines, URL credentials and absolute file paths are masked before anything touches disk. The same input always yields the same output, and masked values carry a stable fingerprint so archives stay correlatable without leaking secrets.
• Multiple formats — a readable Markdown narrative, a machine-readable JSONL full record, and PDF (print-ready HTML plus optional headless-Chromium rendering).
• Archive management — exports are organized by session/date, discoverable, searchable, and deletable (with path-traversal guarding).
• Compliance metadata — every export embeds a header with session id, models, sanitization level, counts, and an optional SHA-256 content hash; a trend/audit view summarizes what was exported, when, and how sensitive it was.
• No model dependency — redaction is rule-based. An optional hook exists if you want to layer an LLM-assisted masker on top.

Features

1. Session export

• Current or historical sessions, from the harness's own event log (ctx.sessionPersistence / ctx.sessions).
• Formats: markdown, jsonl, pdf, or all.
• Event-log folding is tolerant of unknown event types and payload shapes across harness versions.
• Large exports are split into numbered parts (with a parts.json manifest); long messages can be truncated in Markdown with an explicit marker (JSONL always keeps the full record).

2. Redaction (on by default)

All matched values are replaced with <redacted:<rule> sha256:<fingerprint>> where the fingerprint is a salted SHA-256 (12 hex chars). Determinism + a configurable salt keep exports correlatable across files and machines without exposing the secret: because the fingerprint is derived from the secret value alone (not the rule label), the same secret gives the same hex whether it was caught by the env-value, api-key, or jwt rule. The env-value rule runs first, so a KEY=sk-… line is reduced to KEY=<redacted:env …> in one step (masking the value token or quoted string while preserving surrounding prose and commands) before token rules see it.

3. Archive management

<outDir>/
  sessions/<session>/<YYYY-MM-DD>/<YYYY-MM-DD>_<HHMMSS>-<tag>_<format>.<ext>
    <file>.meta.json       # one sidecar per export (see ArchiveEntry)
    <file>.parts.json      # present when the export was split
  archives.json            # searchable index (rebuilt from sidecars if lost)

Files are named with a process-unique tag so two exports in the same second never overwrite each other. List/search by session, format, ISO date range, free-text query, and limit; delete by archive id, file name, or relative path — strictly confined to the archive root (path traversal is rejected). Index writes are serialized in-process, so concurrent tool calls cannot lose records.

4. Compliance

Every export embeds a metadata header: plugin (name, version), session (id, project, cwd, createdAt), exportedAt, models used, sanitization (enabled, level, fired rules, salt fingerprint), event/message counts, optional contentHash, and warnings. An optional SHA-256 hash over the sanitized transcript is included (includeHash: true).

Note: warnings that only become known while writing (large-export chunking, PDF fallback) cannot be embedded in the already-rendered header; they are recorded on the archive index entry + .meta.json sidecar and re-surfaced on tool results.

A trend/audit view (/export-audit) aggregates exports by day, format, session and sanitization level.

5. Toolchain

• Model-facing tools (ctx.tools): session_export, session_export_list, export_delete, sanitize_config.
• Human slash-commands (ctx.commands): /session-export, /session-export-list, /export-delete, /sanitize-config, /export-audit.
• Reusable library: import the harness-independent core via the dsh-session-export/core subpath.

Requirements

• Node.js 20+ (Node 24+ recommended for running the source .ts test suite directly).
• A DeepSeek Harness profile with the base bundle (provides sessions, sessionPersistence, tools, commands).

Installation

This is a standard dsh bundle: an npm package whose package.json declares the dsh.bundle manifest and ships a cordis.patch.yml patch layer plus an entry module exporting name/inject/apply.

# from this repository
dsh plugin --profile demo add github:JohnXu22786/session-export
# or from npm once published
npm install -g dsh-session-export

The patch inserts one row:

# cordis.patch.yml
- insert:
    - id: dsh-session-export
      name: dsh-session-export
      config:
        outDir: !!js dshHomePath('exports')

outDir defaults to $DSH_HOME/exports (i.e. ~/.dsh/exports). Override any setting by targeting the same row id in a later patch layer (config is a whole-row replacement, per harness semantics).

Configuration

- id: dsh-session-export
  name: dsh-session-export
  config:
    outDir: !!js dshHomePath('exports')
    enabled: true
    defaultFormat: markdown        # markdown | jsonl | pdf | auto
    includeNotes: false            # include todo/command/feedback bookkeeping
    includeDocuments: true         # emit the document-tree appendix
    maxChunkBytes: 4194304         # split big exports (0 = never)
    maxMessageChars: 0             # truncate message display in Markdown (0 = never)
    prettyToolArgs: false
    includeHash: true
    redaction:
      enabled: true
      pathMode: mask               # mask | relative | off
      projectRoots: []             # e.g. ['C:\\Users\\you\\work']
      maskApiKeys: true
      maskEnvValues: true
      maskBearerTokens: true
      maskUrlCredentials: true
      maskAbsolutePaths: true
      maskEmails: false
      salt: ""                     # set a secret to harden correlatable fingerprints
      customPatterns:              # [{ pattern, flags?, replacement? }]
        - pattern: '\\d{4}-\\d{4}'
          replacement: '[CARD]'
      aiMaskEnabled: false         # layer a user-provided aiMaskFn on top
    pdf:
      engine: auto                 # auto | chrome | html
      chromePath: ""               # explicit chromium-family binary

Usage

Tools (for the model)

• session_export { format?, sessionId?, redact? } — export a session. Returns artifact paths plus a compliance summary. redact: false opts out for one-off exports.
• session_export_list { query?, sessionId?, format?, before?, after?, limit? } — list/search the archive.
• export_delete { target } — delete by archive id / file name / relative path.
• sanitize_config { action?, sample? } — show the active rules or test a sample string against them.

Slash commands

/session-export [format] [--id=<session>] [--no-redact]
/session-export-list [query] [--format=<f>] [--limit=<n>] [--id=<session>]
/export-delete <id|path|filename>
/sanitize-config [--test <text>]
/export-audit

PDF generation approach

pdf is optional and lightweight by design:

1. The session is rendered as a print-ready, self-contained HTML file (embedded CSS, meta CSP, no scripts, @media print rules).
2. With pdf.engine: chrome (or auto), the plugin drives a headless Chromium-family binary (chromePath or CHROME_PATH, then common install locations) via --headless --print-to-pdf.
3. If no browser binary is available, the export archives the HTML and reports a warning — open it and use your system "Print to PDF".

This avoids heavy PDF dependencies (no native renderer is shipped).

Compliance hash

contentHash is sha256 over the canonical JSON-Lines serialization of the sanitized transcript (header excluded), so two exports of the same sanitized record hash identically regardless of format.

Development

npm install
npm test          # node --test over test/*.test.ts (needs Node 24+ for .ts)
npm run typecheck
npm run build     # tsc → dist/

Structure:

src/
  index.ts            # bundle entry: name / inject / apply
  commands.ts         # slash-command definitions
  tools.ts            # ctx.tools definitions + registration
  adapter/            # thin dsh<->core bridge (backend, types, defineTool)
  engine.ts           # export pipeline orchestration
  config.ts           # configuration shape + normalization
  core/               # harness-independent library (./core subpath)
    fold.ts           # event-log → transcript document
    redact.ts         # deterministic sanitization engine
    archive.ts        # on-disk archive, index, chunking, traversal guard
    render/           # markdown / jsonl / html / pdf
    meta.ts           # compliance header
    audit.ts          # trend/audit aggregation
    filenames.ts      # platform-safe names
    hash.ts           # sha256 / fingerprints

License

MIT