dsh-gpt-bridge

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A read-only engineering evidence bridge between DeepSeek Harness and Custom GPTs.

DSH Agents do the work. DSH provides provenance. Your GPT reviews the evidence.

dsh-gpt-bridge lets a configured Custom GPT:

• discover recent DSH Agent sessions
• inspect runtime and formal Run association
• read manifest-authorized engineering artifacts

Human does not need to manually copy REPORT / FACTS / evidence into the GPT conversation. The bridge reads the real DSH runtime and the formal artifacts produced by a DSH Run.

The Bridge is deliberately read-only.

Through this bridge a GPT cannot:

• start or stop an Agent
• execute shell commands
• edit files
• arbitrarily browse the filesystem
• bypass the manifest allowlist
• modify DSH configuration

Project / package naming. The repository (this project) is dsh-gpt-bridge. The DSH bundle/package that manages the bridge lifecycle inside DSH is dsh-gpt-bridge-manager (see dsh-gpt-bridge-manager/).

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Architecture

DSH Agent
    |
    v
Formal Run
RUN / REPORT / FACTS / manifest / evidence
    |
    v
dsh-gpt-bridge-manager
    |
    v
Authenticated read-only GPT Bridge
    |
    v
Cloudflare Quick Tunnel
    |
    v
GPT Actions
    |
    v
Custom GPT

The bridge exposes exactly three read-only Actions over an authenticated HTTP endpoint. A Cloudflare Quick Tunnel carries HTTPS traffic to the loopback-only bridge; a static Bearer credential authenticates the GPT.

The Three Actions

recentAgents

Discover real, recent DSH Agent Sessions (id, updated time, running state, preset, cwd). Cheap discovery — no per-session model queries.

getAgentBundle

For one real session_id: the DSH runtime facts, the formal Run association (RUN.json), REPORT/FACTS summaries, and the manifest-authorized artifact index.

readArtifact

Read a single artifact file that is inside the manifest allowlist for the associated Run. Absolute paths, .. traversal, symlink escapes, and arbitrary file reads are rejected. Large text is returned as a bounded excerpt; binaries as metadata only.

There are no write Actions.

Trust Model

Agent claim ≠ system provenance ≠ reviewer verdict

• The Agent writes claims (e.g. STATUS_BY_AUTHOR: CONFIRMED) in FACTS.md.
• The DSH runtime and Run association provide provenance: which session, which Run, which artifact root.
• The evidence provides checkable material.
• The reviewer GPT independently decides what to trust.

An Agent writing CONFIRMED does not automatically make a claim trusted. The bridge surfaces the evidence; judgment stays with the reviewer.

Installation

Requirements: a working DeepSeek Harness (DSH) installation and the dsh CLI.

The manager is published to the npm registry as dsh-gpt-bridge-manager (current version 0.1.0). Install it into a DSH profile:

dsh plugin --profile web add dsh-gpt-bridge-manager

dsh plugin initializes the profile on first use, installs the package from the npm registry, and automatically adds the bundle to the profile's dsh.profile.bundles because the package declares dsh.bundle.

For local development, you can also install a tarball built from this repository:

cd dsh-gpt-bridge-manager
npm pack
dsh plugin --profile web add ./dsh-gpt-bridge-manager-0.1.0.tgz

Configuration

Configure the manager in the profile's cordis.patch.yml (e.g. $DSH_HOME/profiles/web/cordis.patch.yml):

- id: gpt-bridge-manager
  config:
    bridgeRoot: /path/to/this/repository
    cloudflaredPath: /path/to/cloudflared   # optional; PATH lookup when omitted
    credentialRef: dsh_gpt_bridge_actions_token

• DSH credential seam: the Bearer value is read from $DSH_HOME/.credentials.yaml under the reference dsh_gpt_bridge_actions_token (source layer must be file). The plugin never generates, writes, rotates, or displays the token.
• cloudflared: the manager starts cloudflared tunnel --url http://127.0.0.1:8933. cloudflaredPath may be omitted to use PATH.
• Bridge lifecycle: on port 8933 the manager starts node <bridgeRoot>/src/server.mjs; a compatible already-running bridge is adopted (never killed); an unknown occupant becomes BLOCKED_PORT_CONFLICT.
• Current URL: the manager shows the ephemeral tunnel URL in the DSH home / Settings UI and exposes it via restartTunnel (plugin-owned tunnels only).

The active tunnel URL is ephemeral — it changes on every tunnel restart and is never part of the repository.

GPT Setup

1. Create or edit a Custom GPT.
2. Import the provided Actions OpenAPI schema: custom-gpt/ACTION_OPENAPI.yaml.
3. Configure Bearer / API Key authentication.
4. Use the secret corresponding to the DSH credential (dsh_gpt_bridge_actions_token value).
5. Set the OpenAPI servers.url to the Current URL the manager displays.
6. Save / Update.
7. Verify with recentAgents (e.g. "看看最近的 DSH Agent。").

See custom-gpt/SETUP.md for the full deployment walkthrough and examples/GPT_INSTRUCTIONS.md for a minimal reviewer-GPT instruction set.

Cold Boot

Start DSH
→ Bridge READY
→ Tunnel ONLINE
→ copy new Current URL
→ update only GPT Actions servers.url
→ keep the same Bearer
→ recentAgents

Full details: coldBoot.md.

Normal Workflow

1. Create a new DSH Session.
2. Run an engineering task.
3. Let the Agent finish.
4. Ask the reviewer GPT to inspect the completed Agent.
5. GPT discovers the real Session and reads formal evidence.
6. GPT returns its verdict and next step.

Human does not need to paste REPORT.md or evidence into the GPT conversation.

The reviewer-GPT pattern in examples/GPT_INSTRUCTIONS.md is an optional / example workflow for this project's environment — it is not a required DSH preset.

Security

• read-only bridge (three Actions, no write/control surface)
• Bearer authenticated (static credential, injected via environment, never in the repository)
• manifest allowlist for artifacts; no arbitrary filesystem reads
• no shell, no Agent control, no DSH mutation
• bridge binds loopback; the Cloudflare Quick Tunnel is the only ingress
• Quick Tunnel URL is ephemeral

Warning: anyone possessing both the active tunnel URL and a valid Bearer credential may access the exposed read-only engineering data. Do not commit .credentials.yaml, Bearer/API keys, private artifacts, or generated runtime state.

Limitations

• The Quick Tunnel URL changes on restart; a Human currently updates servers.url in the GPT Actions schema.
• The bridge does not execute or control Agents.
• Artifact quality depends on formal DSH Run / manifest production.
• Compatibility is validated against the specific DSH version used by the author (see coldBoot.md); DSH/plugin APIs may evolve.

License

MIT — see LICENSE.

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dsh-gpt-bridge is an independent community project for DeepSeek Harness (DSH). It is not affiliated with, endorsed by, or an official project of DeepSeek or OpenAI.

DeepSeek, OpenAI, ChatGPT and related product names/trademarks belong to their respective owners.