Note compaction quality in Unreleased and retune the loop fixture

Main's repetition detector now needs sixteen consecutive repeats, so ten copies of the loop phrase no longer trip it. Twenty copies still flag, and the Unreleased changelog records the compaction-quality pass.

Author: TheGreatAxios

CHANGELOG.md

@@ -13,6 +13,14 @@ parallel copies under `docs/` or `scripts/notes/`. At cut time: rename
 
 ## [Unreleased]
 
+### Agent
+
+- **Compaction keeps scored work, not retry loops.** Errored tool results are no
+  longer auto-pinned; identical errors collapse to one representative. Anchors
+  are scored (writes, successful task completions, plan updates) and pair
+  closures count against `maxAnchorTurns`. The LLM summary is workflow-aware
+  and skips degenerate assistant text.
+
 ### TUI
 
 - **Taller live chain-of-thought preview.** Parent reasoning still paints

tests/unit/summarizer.test.ts

@@ -51,8 +51,11 @@ test("condenseTurns extracts files, tools, and links", () => {
 });
 
 test("condenseTurns drops a degenerate repeated assistant tail from the excerpt (CL-6906)", () => {
+  // The live detector needs 16 consecutive repeats of an 8+ char window
+  // (DEFAULT_REPETITION_CONFIG). Ten copies of this phrase was enough
+  // before that raise; twenty still trips it after.
   const loopPhrase = "we need to check whether the cache key already accounts for locale. ";
-  const loopText = loopPhrase.repeat(10);
+  const loopText = loopPhrase.repeat(20);
   const healthyNote = "Looked at src/auth.ts and found the missing null check.";
   const degenerateTurns: ConversationTurn[] = [
     { role: "user", content: [{ type: "text", text: "please continue" }], timestamp: 1 },