xingyue
6324122168
Closes #519 The ACP protocol's tool_call updates only carry a display title (not a structured tool name) and omit rawInput for polished tools, making the reconstructed messages unusable for step read/show. Changes: - hermes.ts: storePromptResult reads ~/.hermes/sessions/session_{id}.json via loadHermesSession() instead of using ACP-reconstructed messages - acp-client.ts: strip message/tool-call collection logic, keep only text chunk accumulation for final response extraction - step.ts: TurnData gains role + toolCalls fields; formatTurnBody renders them in step read markdown output - README: document sessions.write_json_snapshots requirement
100 lines
2.7 KiB
Markdown
100 lines
2.7 KiB
Markdown
# @uncaged/workflow-agent-hermes
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`uwf-hermes` agent — spawns Hermes chat via ACP and captures session detail.
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## Overview
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Layer 3 agent implementation. Wraps the Hermes CLI using the Agent Client Protocol (ACP). On first visit to a role it sends a composed prompt (role definition, task, history, edge prompt); on continuation it resumes the cached session. Session transcripts and raw output are stored as CAS detail nodes.
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**Dependencies:** `@uncaged/json-cas`, `@uncaged/workflow-util-agent`, `@uncaged/workflow-protocol`, `@uncaged/workflow-util`
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## Installation
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Included as the `uwf-hermes` binary when you install `@uncaged/workflow-agent-hermes`:
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```bash
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bun add -g @uncaged/workflow-agent-hermes
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```
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Requires the `hermes` CLI on `PATH`.
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Hermes must write session JSON snapshots so `uwf-hermes` can load structured tool calls from disk. Add this to `~/.hermes/config.yaml`:
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```yaml
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sessions:
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write_json_snapshots: true
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```
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Session files are stored at `~/.hermes/sessions/session_{sessionId}.json`.
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## CLI Usage
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Invoked by `uwf thread step` (not typically run directly):
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```bash
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uwf-hermes <thread-id> <role>
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```
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Environment variables set by the engine:
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| Variable | Purpose |
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|----------|---------|
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| `UWF_EDGE_PROMPT` | Moderator edge instruction for this step |
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Configure as the default agent via `uwf setup --agent hermes`.
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Override per step:
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```bash
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uwf thread step <thread-id> --agent uwf-hermes
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```
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## API
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All exports come from `src/index.ts`.
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### Agent factory
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```typescript
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function createHermesAgent(): () => Promise<void>
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function buildHermesPrompt(ctx: AgentContext): string
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```
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### ACP client
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```typescript
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class HermesAcpClient {
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// Spawns hermes, handles JSON-RPC over stdio
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}
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```
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## Usage (library)
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```typescript
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import { createHermesAgent, buildHermesPrompt } from "@uncaged/workflow-agent-hermes";
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// CLI entry (src/cli.ts):
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const main = createHermesAgent();
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void main();
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```
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## Internal Structure
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```
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src/
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├── index.ts
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├── cli.ts Binary entrypoint
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├── hermes.ts createHermesAgent, buildHermesPrompt
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├── acp-client.ts HermesAcpClient — ACP JSON-RPC over stdio
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├── session-cache.ts Session ID cache (re-exports kit helpers + isResumeDisabled)
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├── session-detail.ts Parse Hermes session JSON, store CAS detail nodes
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├── schemas.ts Hermes detail CAS schemas
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└── types.ts HermesSessionJson, HermesSessionMessage
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```
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## Configuration
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Uses workflow config from `~/.uncaged/workflow/config.yaml` (via agent-kit). Hermes session files are stored under the workflow storage root (see `session-detail.ts`).
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Set `UWF_HERMES_NO_RESUME=1` to disable session resume (see `isResumeDisabled` in `session-cache.ts`).
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