# @deepseek-ai/dsh-project-instructions

Project instruction file loader for the harness. It discovers `AGENTS.md` with `CLAUDE.md` fallback for each agent session and injects the loaded content as fenced workspace context before model requests.

## Behavior

The plugin listens on the `agent/request` waterfall. For each request it derives the workspace from `agent.session.header.cwd`; if the session has no cwd, it falls back to `process.cwd()` for single-session local/stdio runs. It then finds the project root by walking upward until it sees `.git` as either a directory or a file, considers the ancestor chain from project root to cwd, and loads at most one instruction file per directory: `AGENTS.md` wins, `CLAUDE.md` is a compatibility fallback.

User-global instructions live at `$DSH_HOME/AGENTS.md`; `$DSH_HOME` defaults to `~/.dsh`. The user-global file renders before project files, so deeper project files appear later in the context and can override broader guidance.

The loaded files are inserted as a synthetic user-role workspace-context message, not as provider system text and not as persisted session events. The rendered envelope states that these files are workspace-provided guidance, lower authority than system/developer/direct user instructions, and must not override safety, permission, or secret-handling rules.

## Config

```ts
export interface Config {
  dshHome?: string
  projectRootMarkers?: string[]
  baselineMaxBytes?: number
  enableClaudeFallback?: boolean
}
```

`projectRootMarkers` defaults to `['.git']`, `baselineMaxBytes` defaults to `65536`, and `enableClaudeFallback` defaults to `true`. Setting `baselineMaxBytes` to `0` disables instruction injection.

## Budgeting and cache

The renderer keeps full text until the configured byte budget is exceeded. When it must trim, it preserves more-specific files first, drops whole less-specific files before truncating a more-specific file, and emits an HTML comment naming omitted and truncated files with byte counts.

Discovery re-walks the applicable ancestor chain on every request so newly created baseline files are noticed. File content is cached by normalized absolute path plus `mtimeMs` and `size`; a changed signature causes a re-read.

## Non-goals

This phase does not implement lazy on-touch nested loading, `contextPaths()`, shell parsing, lowercase filenames, `.claude/` rule directories, local/private variants, `@path` imports, file watching, or model-generated summaries. Those need separate semantics and, for on-touch loading, real structured file tools that can report touched paths.