feat(llm): route adapters by provider

packages/compact/compact/README.md

@@ -29,7 +29,7 @@ Both methods are **abstract** — the backend owns the entire strategy (token es
 
 1. appends `compact/start` (log-only) — acquires the lock,
 2. summarizes the range,
-3. appends `compact/summary` (log-only) — provenance: summary, range, shadowed seqs, token count,
+3. appends `compact/summary` (log-only) — provenance: summary, range, shadowed seqs, token count, and provider/model call envelope,
 4. appends a single `user/message` with `surfaceOp: { op: 'replace', start, end }` carrying the summary — **the only surface mutation**,
 5. appends `compact/end` (log-only) — releases the lock.
 

packages/compact/compact/src/types.ts

@@ -32,6 +32,8 @@ declare module '@deepseek-ai/dsh-session' {
       shadowedRange: { start: number; end: number }
       shadowedSeqs: number[]
       shadowedTokenCount: number
+      /** The provider route that wrote the summary. */
+      provider: string
       /**
        * The model that wrote the summary — the summarize call's envelope,
        * reported by the backend that made the call, logged so the one-shot

packages/compact/compact/tests/compact.spec.ts

@@ -41,6 +41,7 @@ class StubCompactService extends CompactService {
       shadowedRange: { start, end },
       shadowedSeqs: [],
       shadowedTokenCount: 0,
+      provider: 'mock',
       model: 'stub',
     })
     const endEvent = session.append('compact/end', { turn: 0 })

packages/compact/compact/tests/render.spec.ts

@@ -54,7 +54,7 @@ describe('renderTranscript', () => {
       content: [{ type: 'text', text: 'fix the bug' }],
       source: { kind: 'user' },
     }, { surfaceOp: 'append' })
-    const assistant = s.append('assistant/message', {
+    const assistant = s.append('assistant/message', { provenance: { provider: 'mock', model: 'mock' },
       turn: 0, step: 0,
       content: [{ type: 'text', text: 'looking' }],
     }, { surfaceOp: 'append' })
@@ -111,7 +111,7 @@ describe('renderTranscript', () => {
       content: [{ type: 'text', text: '' }],
       source: { kind: 'user' },
     }, { surfaceOp: 'append' })
-    const emptyAssistant = s.append('assistant/message', {
+    const emptyAssistant = s.append('assistant/message', { provenance: { provider: 'mock', model: 'mock' },
       turn: 0, step: 0,
       content: [{ type: 'text', text: '' }],
     }, { surfaceOp: 'append' })