feat(dap): added socket-mode transport and improved session initialization for DAP adapters

- Added socket-mode transport support for DAP adapters, enabling network socket debuggers like dlv alongside stdio mode.
- Improved extensionless binary debugging to prioritize native debuggers and adapters with root markers.
- Fixed DAP session initialization to subscribe to stop events before launching/attaching, preventing missed stopOnEntry events.
- Refactored session event handling to fetch stack frames outside dispatch loop, eliminating deadlocks and improving responsiveness.
- Enhanced evaluate requests to default to top stopped frame when frameId is not explicitly provided.

packages/coding-agent/CHANGELOG.md

@@ -1,9 +1,10 @@
 # Changelog
 
 ## [Unreleased]
-
 ### Added
 
+- Socket-mode DAP adapter support for debuggers like dlv that communicate via network sockets instead of stdio; Linux uses unix domain sockets, macOS/other platforms use TCP with client-addr dialing
+- Improved extensionless binary debugging: native debuggers (gdb, lldb-dap) and adapters with root markers are now preferred over unrelated adapters like debugpy
 - Debug tool with DAP (Debug Adapter Protocol) support for launching and attaching debuggers, setting breakpoints, stepping through execution, inspecting threads/stack/variables, and evaluating expressions
 - Debug adapter configuration for gdb, lldb-dap, debugpy, and dlv with language/file-type matching and root marker detection
 - Debug session management with support for source and function breakpoints, conditional breakpoints, stack trace inspection, scope/variable exploration, and program output capture
@@ -19,11 +20,14 @@
 
 ### Changed
 
+- DAP session initialization now subscribes to stop events before launching/attaching to avoid missing stopOnEntry events
+- Stack frame fetching moved outside the event dispatch loop to prevent deadlocks and improve responsiveness
+- Evaluate requests now default to the top stopped frame when frameId is not explicitly provided
 - Eager todo enforcement now skips prompts ending with question marks or exclamation marks, treating them as queries or commands rather than statements requiring task planning
 - Chunk read output now displays fully-qualified anchor paths (e.g., `[class_Worker.fn_run#CRC]`) instead of bare names, making targets unambiguous for edits
 - Chunk edit tool documentation clarified: `target` must be the fully-qualified path with `#CRC` suffix; added guidance to run `read(path="file", sel="?")` for canonical target listings when anchor style is unclear
 - Chunk read tool documentation updated: `sel` parameter now documents the `?` selector for canonical target listings, and clarifies that default output shows full paths
-- Chunk edit schema and tool contract: explicit `op` (`replace`, `delete`, `append`, `prepend`, `after`, `before`); sibling inserts use `anchor` instead of separate after/before target fields; `replace` supports optional `line` / `end_line` for line-scoped edits (former splice-style behavior); insert ops omit CRC where appropriate, mutations require checksum on target
+- Chunk edit schema and tool contract: explicit `op` (`replace`, `append`, `prepend`, `after`, `before`); use `replace` with empty `content` to remove a chunk (no separate `delete` op); sibling inserts use `anchor` instead of separate after/before target fields; insert ops omit CRC where appropriate, mutations require checksum on target
 - Chunk path handling: parse selector and CRC separately, sanitize selectors (strip filename prefixes, uppercase checksums), accept embedded `#CRC` on targets, auto-accept stale CRC for later ops in the same batch on the same chunk
 - Chunk UX: streaming and final edit previews show chunk edits next to hashline edits with op-specific labels; prompt docs shortened with rules table, `…` in examples, and helper-based path/anchor samples
 - `log_experiment` only reverts files modified by the run; prompts and errors document that pre-existing dirty files are preserved; richer pending-run error context; `init_experiment` no-ops when the contract matches unless `new_segment`; secondary metrics informational only (no `force` for drift)
@@ -43,6 +47,8 @@
 
 ### Fixed
 
+- DAP stopped event handling no longer blocks the message reader, preventing potential deadlocks during rapid event sequences
+- Chunk-mode whole-chunk replaces now preserve attached leading comments and docblocks when replacement content starts at the declaration, preventing accidental comment loss during agent edits
 - Chunk edit error messages now consistently report checksum mismatches with the format `did not match checksum "XXXX"` instead of variable phrasing
 - Chunk selector validation for edits now rejects non-canonical selectors (suffix-only like `fn_run` or prefix-stripped like `run`), requiring fully-qualified paths to prevent ambiguity
 - Plan review previews now re-append at the chat tail on refresh, keeping them adjacent to the active selector instead of updating off-screen