chore(release): 1.0.7

- Fix Infinity anchorTimestamp repair on JSON round-trip (blocks extending
  to end-of-conversation now restored correctly instead of discarded)
- Fix nextBlockId calculation to use max(id)+1 instead of array length
- Rename internal prompt tag <dcp-message-id> to <dcp-id>
- Add regression tests for corrupted-block resilience (PR #3, @wassname)
- Update README with Contributors section
- Update CHANGELOG for 1.0.7
- Bump package.json to 1.0.7

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -1,5 +1,22 @@
 # Changelog
 
+## [1.0.7] - 2026-04-14
+
+### Fixed
+
+- **Infinity anchorTimestamp ghost block spiral** — When a `compress` range extended to the end of the conversation, `resolveAnchorTimestamp` returned `Infinity`. `JSON.stringify(Infinity)` serialises to `null`, so on session restore the corrupted block's timestamps coerced to `0` in JS overlap checks, making every new range appear to overlap the ghost block and trapping the model in a compression spiral (101 failures over 2 hours). `resolveAnchorTimestamp` now returns `endTimestamp + 1` instead of `Infinity`.
+- **Corrupted block propagation on session restore** — `index.ts` now filters out any persisted compression block whose `startTimestamp`, `endTimestamp`, or `anchorTimestamp` is non-finite before restoring state, preventing ghost blocks from surviving across sessions.
+- **Non-finite timestamp guard** — All code paths that create or apply compression blocks now validate timestamps are finite before proceeding, failing fast rather than silently corrupting state.
+- **Overlap error diagnostics** — Overlap error messages now include the existing block's timestamp range to aid debugging.
+- **Prompt tag name mismatch** — The prompt tag was named `<dcp-message-id>` but the code injected `<dcp-id>`; tag name corrected to `<dcp-id>` throughout `prompts.ts`.
+- **Duplicate test** — Removed a duplicate test case from `pruner.test.ts`.
+
+### Added
+
+- **Regression tests** — New test cases for the `Infinity` anchor scenario, `null`-timestamp corrupted blocks, and corrupted-block resilience on session restore.
+
+Thanks to [@wassname](https://github.com/wassname) for diagnosing and fixing the compression spiral root cause in [#3](https://github.com/complexthings/pi-dynamic-context-pruning/pull/3).
+
 ## [1.0.6] - 2026-04-09
 
 ### Fixed

README.md

@@ -148,3 +148,10 @@ npx tsc --noEmit   # type-check without emitting
 ```
 
 The extension is loaded by pi via [jiti](https://github.com/unjs/jiti) so TypeScript is executed directly — no build step required for normal use.
+
+## Contributors
+
+[![complexthings](https://github.com/complexthings.png?size=50)](https://github.com/complexthings) [@complexthings](https://github.com/complexthings)
+[![wassname](https://github.com/wassname.png?size=50)](https://github.com/wassname) [@wassname](https://github.com/wassname)
+
+Full contributor list: https://github.com/complexthings/pi-dynamic-context-pruning/graphs/contributors

index.ts

@@ -81,17 +81,30 @@ export default function (pi: ExtensionAPI) {
         const data = entry.data as any
 
         if (data?.compressionBlocks) {
-          // Filter out blocks with corrupted (null/NaN/Infinity) timestamps —
-          // these were caused by Infinity anchorTimestamp values that became
-          // null after JSON round-trip.
-          const validBlocks = data.compressionBlocks.filter(
-            (b: any) =>
-              Number.isFinite(b.startTimestamp) &&
-              Number.isFinite(b.endTimestamp) &&
-              Number.isFinite(b.anchorTimestamp),
-          )
+          // Filter out blocks with corrupted timestamps, then repair
+          // anchorTimestamp which is legitimately Infinity for blocks that
+          // extend to end-of-conversation (JSON round-trips Infinity as null).
+          const validBlocks = data.compressionBlocks
+            .filter(
+              (b: any) =>
+                Number.isFinite(b.startTimestamp) &&
+                Number.isFinite(b.endTimestamp),
+            )
+            .map((b: any) => ({
+              ...b,
+              // anchorTimestamp is Infinity when the block extends to the end
+              // of the conversation; JSON round-trips Infinity as null, so
+              // repair it here rather than discarding the block.
+              anchorTimestamp: Number.isFinite(b.anchorTimestamp)
+                ? b.anchorTimestamp
+                : Infinity,
+            }))
           state.compressionBlocks = validBlocks
-          state.nextBlockId = data.nextBlockId ?? state.compressionBlocks.length
+          state.nextBlockId =
+            data.nextBlockId ??
+            (state.compressionBlocks.length > 0
+              ? Math.max(0, ...state.compressionBlocks.map((b: any) => b.id)) + 1
+              : 1)
           state.tokensSaved = data.tokensSaved ?? 0
           state.totalPruneCount = data.totalPruneCount ?? 0
         }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@complexthings/pi-dynamic-context-pruning",
-  "version": "1.0.6",
+  "version": "1.0.7",
   "description": "PI coding agent extension — Dynamic Context Pruning (DCP)",
   "keywords": [
     "pi-package",