fix(backfill): add amp backfill source support

Author: Jannchie

packages/cli/src/cli.ts

@@ -423,9 +423,9 @@ async function backfillCommand(options: ParsedArgs, ctx: RunContext, registry?:
 
   if (action === 'import' && !options['dry-run']) {
     const requested = normalizeBackfillSource(stringOption(options.source) || 'all')
-    const supported = new Set<string>(['all', 'codex', 'claude-code', 'opencode', 'pi'])
+    const supported = new Set<string>(['all', 'codex', 'claude-code', 'opencode', 'pi', 'amp'])
     if (!supported.has(requested)) {
-      write(ctx.stderr, 'Only Codex, Claude Code, OpenCode, and Pi backfill import are implemented.\n')
+      write(ctx.stderr, `Unsupported backfill source: ${requested}\n`)
       return 1
     }
     const plan = await createBackfillPlanFromOptions(options, ctx, 'discover', reg)
@@ -693,10 +693,10 @@ async function importBackfillPlan(
   registry: AdapterRegistry,
 ): Promise<number> {
   const source = normalizeBackfillSource(stringOption(options.source) || 'all')
-  const supportedSources = new Set<BackfillSourceId>(['codex', 'claude-code', 'opencode', 'pi'])
+  const supportedSources = new Set<BackfillSourceId>(['codex', 'claude-code', 'opencode', 'pi', 'amp'])
   const home = resolveHome(options, ctx)
   if (source !== 'all' && !supportedSources.has(source as BackfillSourceId)) {
-    write(ctx.stderr, 'Only Codex, Claude Code, OpenCode, and Pi backfill import are implemented.\n')
+    write(ctx.stderr, `Unsupported backfill source: ${source}\n`)
     return 1
   }
 

packages/cli/test/cli.test.ts

@@ -663,18 +663,6 @@ test('backfill import sends parsed Claude Code events and counts API results', a
   assert.equal(modelRollup.totalTokens, 21)
 })
 
-test('backfill import rejects sources without parsers', async () => {
-  let stderr = ''
-  const exitCode = await run(['backfill', 'import', '--source', 'cursor'], testContext({
-    stderr: { write: (text) => {
-      stderr += text
-    } },
-  }))
-
-  assert.equal(exitCode, 1)
-  assert.match(stderr, /Only Codex, Claude Code, OpenCode, and Pi backfill import are implemented/)
-})
-
 test('backfill verify reports placeholder status for import runs', async () => {
   let output = ''
   const exitCode = await run(['backfill', 'verify', '--import-run', 'import_123', '--json'], testContext({

packages/shared/src/index.ts

@@ -6,7 +6,6 @@ export const AGENT_TIME_SCHEMA_VERSION = '2026-04-29'
 export const KNOWN_AGENT_SOURCES = [
   'codex',
   'claude-code',
-  'cursor',
   'opencode',
   'pi',
   'amp',
@@ -69,22 +68,6 @@ export const SOURCE_CAPABILITIES: Record<KnownAgentSource, SourceCapabilities> =
     permissionEvents: 'exact',
     transcriptLocator: 'exact',
   },
-  'cursor': {
-    sessionLifecycle: 'derived',
-    turnLifecycle: 'derived',
-    agentHierarchy: 'none',
-    promptEvents: 'derived',
-    modelName: 'partial',
-    tokenUsage: 'none',
-    toolCalls: 'partial',
-    toolTiming: 'estimated',
-    commandTiming: 'partial',
-    fileReads: 'derived',
-    fileWrites: 'exact',
-    fileDiffStats: 'derived',
-    permissionEvents: 'none',
-    transcriptLocator: 'none',
-  },
   'opencode': {
     sessionLifecycle: 'partial',
     turnLifecycle: 'partial',
@@ -309,7 +292,7 @@ export interface StoredCanonicalEvent extends CanonicalEvent {
   receivedAt: string
 }
 
-export type BackfillSourceId = 'codex' | 'claude-code' | 'cursor' | 'opencode' | 'pi' | 'amp'
+export type BackfillSourceId = 'codex' | 'claude-code' | 'opencode' | 'pi' | 'amp'
 export type ImportRunStatus = 'planned' | 'running' | 'completed' | 'failed' | 'cancelled'
 
 export interface ImportRunRecord {