pi-dynamic-context-pruning/CHANGELOG.md

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 for diagnosing and fixing the compression spiral root cause in #3.

[1.0.6] - 2026-04-09

Fixed

• Orphaned tool_use/tool_result after compression — Compression ranges that touched part of an assistant→toolResult group could leave orphaned tool_use or tool_result blocks, causing Anthropic API 400 errors (unexpected tool_use_id found in tool_result blocks). The backward and forward expansion logic now correctly skips PI-internal passthrough roles (compaction, branch_summary, custom_message) when scanning for paired messages, ensuring atomic removal of complete tool groups.
• Content mutation across context events — applyPruning now deep-clones message content instead of shallow-copying, preventing injected dcp-id blocks from accumulating on shared message objects across successive context events.

Added

• Post-compression repair function — repairOrphanedToolPairs runs after all compression blocks are applied as a safety net. It removes orphaned toolResult/bashExecution messages whose toolCallId has no matching toolCall in any assistant message, and strips orphaned toolCall blocks from assistant messages whose results no longer exist.
• New test cases — Tests 5–9 covering passthrough role handling (backward and forward expansion), content mutation isolation, multi-block orphan repair, and direct orphan cleanup.

[1.0.5] - 2026-04-06

Fixed

• Prevent orphaned tool_use blocks from compression and harden autocomplete.

[1.0.4] - 2026-04-05

Fixed

• Tool crash on compression.

[1.0.3] - 2026-04-04

Fixed

• Various errors and issues.

[1.0.2] - 2026-04-03

Changed

• Added pi package details to package.json.

[1.0.1] - 2026-04-02

Added

• Initial release.