Finish the domain pipeline cleanup

internal/framework/pipeline/runner_terminal_debug_test.go

@@ -18,6 +18,7 @@ type terminalChunker struct {
 	chunks   []source.Chunk
 	warnings []contracts.Warning
 	err      error
+	calls    *int
 }
 
 func (c terminalChunker) Key() string { return c.key }
@@ -25,6 +26,9 @@ func (c terminalChunker) Key() string { return c.key }
 func (terminalChunker) ReferenceSlots() []contracts.ReferenceSlot { return nil }
 
 func (c terminalChunker) Chunk(context.Context, contracts.ChunkRequest) (contracts.ChunkResult, error) {
+	if c.calls != nil {
+		(*c.calls)++
+	}
 	return contracts.ChunkResult{Chunks: cloneSourceChunks(c.chunks), Warnings: cloneWarnings(c.warnings)}, c.err
 }
 
@@ -211,6 +215,30 @@ func TestRunnerJoinsPrimaryAndAttemptWriteErrors(t *testing.T) {
 	})
 }
 
+func TestRunnerDoesNotRetryAfterTerminalAttemptWriteFailure(t *testing.T) {
+	prepared, chunks := preparedTerminalDebugPipeline(t)
+	prepared.resolved.Chunk.Retries = 1
+	calls := 0
+	prepared.chunker = terminalChunker{key: prepared.resolved.Chunk.Module, chunks: chunks, calls: &calls}
+	prepared.chunkValidators.validators = []preparedValidator{{
+		resolved: ResolvedValidator{Binding: Binding("terminal/chunk-validator"), Target: ValidatorTargetChunk},
+		chunk:    terminalChunkValidator{result: contracts.ValidationResult{Approved: true}},
+	}}
+	debug := newCapturedDebugRecorder()
+	debug.failPath = "chunk/attempt-01.json"
+
+	_, err := New().Run(context.Background(), RunInput{Prepared: prepared, RawInput: []byte("input"), Debug: debug})
+	if err == nil || !strings.Contains(err.Error(), "write chunk attempt debug artifact") || !strings.Contains(err.Error(), "debug recorder failure") {
+		t.Fatalf("Run() error = %v, want terminal attempt debug failure", err)
+	}
+	if calls != 1 {
+		t.Fatalf("chunk calls = %d, want one attempt without retry", calls)
+	}
+	if debug.has("chunk/attempt-02.json") {
+		t.Fatal("second chunk attempt envelope exists after non-retryable debug persistence failure")
+	}
+}
+
 func TestRunnerKeepsExtractModuleAndValidatorLLMCallsIsolated(t *testing.T) {
 	prepared := preparedAttemptDebugPipeline(t)
 	debug := newCapturedDebugRecorder()