diff --git a/.gitignore b/.gitignore
index e38b0e9bb..6df539057 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,13 @@
 # ── Compiled test output ──
 dist-test/
 
+# ── Compiled output in src/ (should only contain .ts source) ──
+src/**/*.js
+src/**/*.js.map
+src/**/*.d.ts
+src/**/*.d.ts.map
+!src/**/*.test.js
+
 # ── GSD project state (development-only, lives in worktree branches) ──
 package-lock.json
 .claude/
@@ -42,6 +49,9 @@ tmp/
 packages/*/dist/
 packages/*/node_modules/
 
+# ── Scratch/WIP files ──
+preflight-script.ts
+
 # ── GSD baseline (auto-generated) ──
 dist/
 !/pkg/dist/modes/
@@ -55,6 +65,7 @@ TODOS.md
 .planning/
 .audits/
 docs/coherence-audit/
+.plans/
 
 # ── GSD project state (per-worktree, never committed) ──
 .gsd/
diff --git a/src/resources/extensions/gsd/error-classifier.ts b/src/resources/extensions/gsd/error-classifier.ts
index d228cfa34..604167451 100644
--- a/src/resources/extensions/gsd/error-classifier.ts
+++ b/src/resources/extensions/gsd/error-classifier.ts
@@ -48,7 +48,9 @@ const NETWORK_RE = /network|ECONNRESET|ETIMEDOUT|ECONNREFUSED|socket hang up|fet
 const SERVER_RE = /internal server error|500|502|503|overloaded|server_error|api_error|service.?unavailable/i;
 // ECONNRESET/ECONNREFUSED are in NETWORK_RE (same-model retry first).
 const CONNECTION_RE = /terminated|connection.?refused|other side closed|EPIPE|network.?(?:is\s+)?unavailable|stream_exhausted(?:_without_result)?/i;
-const STREAM_RE = /Unexpected end of JSON|Unexpected token.*JSON|Expected.*in JSON|Unterminated.*in JSON|SyntaxError.*JSON/i;
+// Catch-all for V8 JSON.parse errors: all modern variants end with "in JSON at position \d+".
+// This eliminates the need to enumerate every error message variant individually.
+const STREAM_RE = /in JSON at position \d+|Unexpected end of JSON|SyntaxError.*JSON/i;
 const RESET_DELAY_RE = /reset in (\d+)s/i;
 
 /**
@@ -91,9 +93,6 @@ export function classifyError(errorMsg: string, retryAfterMs?: number): ErrorCla
   }
 
   // 4. Stream truncation — downstream symptom of connection drop
-  //    Checked before server/connection because JSON parse errors can contain
-  //    substrings like "position 500" (matches SERVER_RE) or "Unterminated"
-  //    (matches CONNECTION_RE's "terminated" pattern).
   if (STREAM_RE.test(errorMsg)) {
     return { kind: "stream", retryAfterMs: retryAfterMs ?? 15_000 };
   }
diff --git a/src/resources/extensions/gsd/tests/terminated-transient.test.ts b/src/resources/extensions/gsd/tests/terminated-transient.test.ts
index f15223f60..84c0c8db0 100644
--- a/src/resources/extensions/gsd/tests/terminated-transient.test.ts
+++ b/src/resources/extensions/gsd/tests/terminated-transient.test.ts
@@ -82,3 +82,47 @@ test("#2572: 'SyntaxError' with JSON context (truncated stream) is transient", (
   assert.equal(isTransient(result), true, "'SyntaxError...JSON' should be transient");
   assert.equal(result.kind, "stream", "JSON parse errors are stream kind");
 });
+
+// --- Catch-all: all V8 JSON.parse variants matched by "in JSON at position" ---
+
+test("V8 JSON.parse: 'No number after minus sign in JSON' is transient (#2882)", () => {
+  const result = classifyError("No number after minus sign in JSON at position 42");
+  assert.equal(isTransient(result), true);
+  assert.equal(result.kind, "stream");
+});
+
+test("V8 JSON.parse: 'Expected property value after colon' is transient", () => {
+  const result = classifyError("Expected ',' or '}' after property value in JSON at position 108");
+  assert.equal(isTransient(result), true);
+  assert.equal(result.kind, "stream");
+});
+
+test("V8 JSON.parse: 'Bad control character in string literal' is transient", () => {
+  const result = classifyError("Bad control character in string literal in JSON at position 5");
+  assert.equal(isTransient(result), true);
+  assert.equal(result.kind, "stream");
+});
+
+test("V8 JSON.parse: 'Bad escaped character' is transient", () => {
+  const result = classifyError("Bad escaped character in JSON at position 17");
+  assert.equal(isTransient(result), true);
+  assert.equal(result.kind, "stream");
+});
+
+test("V8 JSON.parse: 'Unexpected number' is transient", () => {
+  const result = classifyError("Unexpected number in JSON at position 0");
+  assert.equal(isTransient(result), true);
+  assert.equal(result.kind, "stream");
+});
+
+test("V8 JSON.parse: 'Unexpected string' is transient", () => {
+  const result = classifyError("Unexpected string in JSON at position 12");
+  assert.equal(isTransient(result), true);
+  assert.equal(result.kind, "stream");
+});
+
+test("V8 JSON.parse with line/column suffix is transient", () => {
+  const result = classifyError("Unexpected token x in JSON at position 99 (line 3 column 14)");
+  assert.equal(isTransient(result), true);
+  assert.equal(result.kind, "stream");
+});