A native DeepSeek Harness plugin that prepends a deployment-configured system-prompt prefix and fixed reference exchanges to every web conversation, without writing to session logs.
DSH integration
Native runtime
Author-claimed
Safety audit
Unaudited
Last verified
2026-09-01
License
MIT
01What can it help you accomplish?
Insert a deployment-configured system-prompt prefix and fixed reference exchanges into every DeepSeek Harness conversation
Ordered system-prompt sections rendered ahead of the deployment persona, plus reference user/assistant messages injected as real alternating messages on every ordinary request
Teams running DeepSeek Harness (dsh) web deployments who need a stable, cache-friendly system-prompt prefix and fixed few-shot examples
02How to install into DeepSeek Harness
Installation steps
- 01
Add from GitHub (recommended — built artifacts are committed, so no build approval is needed): `dsh plugin --profile web add github:WM-CODER/custom-first-control-prompt`
$ dsh plugin --profile web add github:WM-CODER/custom-first-control-prompt
- 02
Add from npm: `dsh plugin --profile web add @wm-coders/dsh-custom-first-control-prompt`
$ dsh plugin --profile web add @wm-coders/dsh-custom-first-control-prompt
- 03
Add from a local directory during development: `dsh plugin --profile web add ./path/to/custom-first-control-prompt`
$ dsh plugin --profile web add ./path/to/custom-first-control-prompt
- 04
After installation, restart the web app (`dsh --profile web` or run `restart-web.ps1` / `restart-web.sh`)
$ dsh --profile web
Verify the integration
Not specified by the author
Rollback
- Uninstall the plugin: `dsh plugin --profile web remove @wm-coders/dsh-custom-first-control-prompt`
03DSH integration and capability boundaries
Native DSH plugin installed via `dsh plugin add` — injects a deployment-configured system-prompt prefix
Ordered system-prompt sections
deployment-configured text fragments (sections[].text)→sections rendered ahead of the deployment persona on every request
Reference user/assistant exchanges injected per request
config.history entries (user / assistant pairs)→real alternating messages prepended on the request path for every ordinary conversation request
intercepts `llm/stream` and injects messages on the request path; writes nothing to session logsPrefix-cache reuse via byte-identical static content
static prompt content→byte-identical rendering on every request, preserving prefix-cache reuse
04Who is it for? When not to use it?
Good for
- Teams running DeepSeek Harness (dsh) web deployments who need a stable, cache-friendly system-prompt prefix and fixed few-shot examples
05Compatibility, maintenance and safety notes
- By default the prefix and reference exchanges are not applied to subagents (`includeSubagents: false`); enable it explicitly in config if subagents should receive them.
- If `sections` is absent or empty, the plugin registers nothing — no system-prompt prefix is injected.
- Reference exchanges are injected by intercepting the `llm/stream` request path and are not written to session logs; they appear only on the request, not in stored history.
MIT · latest release v0.2.3 (2026-08-21), last push 2026-08-21
06Frequently asked questions
How do I install custom-first-control-prompt in DeepSeek Harness?
Run `dsh plugin --profile web add github:WM-CODER/custom-first-control-prompt` (GitHub, recommended), `dsh plugin --profile web add @wm-coders/dsh-custom-first-control-prompt` (npm), or add a local directory. Then restart the web app with `dsh --profile web` or `restart-web.ps1` / `restart-web.sh`.
What does this plugin actually inject into my conversations?
It prepends ordered system-prompt sections ahead of the deployment persona and injects configured reference user/assistant exchanges as real alternating messages on every ordinary request, via `llm/stream` interception with zero session-log writes.
Will it preserve prompt caching?
Yes — static content renders byte-identically on every request, so the prefix-cache is reused across requests.
Does it affect subagents?
By default, no. The `includeSubagents` config flag defaults to false, so subagents do not receive the prefix or reference exchanges unless you enable it.
How do I remove it?
Uninstall with `dsh plugin --profile web remove @wm-coders/dsh-custom-first-control-prompt`.
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08Data and sources
dsh plugin --profile web add github:WM-CODER/custom-first-control-prompt
Deployment-configured prompt prefix. Ordered system-prompt sections render ahead of the deployment persona
This page is generated from the project’s public documentation, repository metadata and a structured parse of DSH Plugins; last verified on 2026-09-01. Found an error? Submit a correction.
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