accpowered/dsh-credential-manager

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Named user credentials for DeepSeek Harness: let the model use your API keys, tokens, and logins by reference — secret values never enter the conversation.

One credential is one flat record holding exactly one secret value. The model creates empty placeholder records with its credential_create tool; you enter the secret value in Settings → Credentials. Every configured secret is injected into each model shell execution as a DSH_CM_<ID> environment variable, resolved per execution, so the value reaches commands without ever being printed into the transcript.

What you get

Piece	Kind	Purpose
credential-manager	host service plugin	Metadata sidecar (storage domain), secret values behind the ctx.credentials seam, DSH_CM_* shell-env injection
tool-credential-manager	host tools plugin	Model-facing tools credential_list / credential_create / credential_read / credential_update_note + a system-prompt policy section
Settings → Credentials	web client plugin (dsh.client)	The page where you enter/manage secret values; talks to the host over a self-mounted Typert Remote namespace

Install

From GitHub (builds on install via its prepare script; pnpm will ask you to allow the build once):

dsh plugin --profile web add github:accpowered/dsh-credential-manager

If pnpm prints an allowBuilds prompt, add the printed key under allowBuilds in the profile's pnpm-workspace.yaml and re-run the add — this is install-time code execution permission, so only allow sources you trust (pinning a commit, github:accpowered/dsh-credential-manager#<sha>, is recommended).

From a local checkout:

dsh plugin --profile web add ./dsh-credential-manager

Restart dsh web (or your profile) and hard-refresh the browser.

How it works with the harness

The bundle patch (cordis.patch.yml) inserts two host rows; the dsh.client declaration makes the web plane serve the settings page automatically:

- insert:
    - id: credential-manager
      name: dsh-credential-manager
    - id: tool-credential-manager
      name: dsh-credential-manager/tools

No harness source is modified:

• The tools register into the host tool registry, so every agent preset sees them.
• The settings page mounts its own Typert Remote contribution through the public ctx.remote.$mount seam — no api/remotes edit needed.
• The host service is a TypertRemoteService; the gateway discovers its @Remote methods dynamically (SRC markers), so no code generation step is required to deploy.

Stock-upstream note: the upstream api/remotes forwarded-event allowlist does not include credential-manager/updated, so the settings page does not receive live push invalidations from other surfaces; it still converges through authoritative mutation replies and connection-reset refetches. If you run a harness that forwards the event, the page lights up live automatically.

Configuration

Both host rows work with zero configuration; every knob carries a schema default. To tune, restate the row in your profile's cordis.patch.yml (a patch replaces the row's whole config):

- id: credential-manager
  name: dsh-credential-manager
  config:
    maxNoteBytes: 8192        # UTF-8 byte cap for one user/LLM note field

- id: tool-credential-manager
  name: dsh-credential-manager/tools
  config:
    promptOrder: 116          # ordering weight of the system-prompt policy section

To mount only the service and the settings page (no model-facing tools), delete the tool-credential-manager row from the bundle patch.

Usage

1. In a conversation, when the model needs a credential it calls credential_create with a name only (never a value) and asks you to fill it in.
2. Open Settings → Credentials, find the placeholder, and enter the secret value (write-only; it is never read back into any page or transcript).
3. The model uses the value through the listed DSH_CM_<ID> variable in bash/pwsh commands: curl -H "Authorization: Bearer $DSH_CM_MYAPI" ....
4. credential_read exists as a deliberate last-resort escape hatch for non-shell use; the harness instructs the model to prefer the variable path.

Expired credentials keep working (the expiry day is informational) but are flagged in the page and in credential_list so the model can tell you to rotate them.

Uninstall

dsh plugin --profile web remove dsh-credential-manager

The service, tools, system-prompt section, settings page, and Remote namespace all detach with the plugin fiber. Persisted metadata rows (storages/credential_manager.json in the harness home) and stored secret values are left untouched.

Development

pnpm install
pnpm build       # tsc declarations + tsdown (node lib + browser client bundle)
pnpm test        # vitest: service CRUD / seam confinement / tool mapping

Layout: src/index.ts (host service, default export), src/tools.ts (tools plugin), src/types.ts + src/spec.ts (wire types + storage domain), src/client/ (settings page; remote.ts is the hand-maintained Typert Remote contribution — keep it in sync with the service's @Remote methods).

License

MIT