.gitignore: cover ad-hoc debug captures + Claude Code state

Two patterns that have been polluting `git status` across recent
debugging sessions:

1. Root-level capture files from manual asb-relay / trace runs:
   - rust-cs.txt, rust-sc.txt, rust.log (asb-relay TCP dumps,
     hex-prefixed C->S / S->C and the relay log)
   - rust-trace-*.txt (MX_ASB_TRACE_REPLY=1 captures, e.g. the
     trace-orig dump that surfaced the F33 InvalidConnectionId
     evidence)

   Anything worth keeping should be promoted into `captures/` or
   `analysis/` with a name describing what it captures; these
   transient root-level files are noise.

2. `.claude/` — Claude Code's project-local state directory
   (scheduled-task locks, agent state). User/host-specific.

Removed the existing root-level rust-*.txt files in the same
commit; future runs will be ignored automatically.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitignore

@@ -24,6 +24,11 @@ Cargo.lock.bak
 *.bak
 *.tmp
 
+# ---- Claude Code project-local state ----
+# `.claude/` holds per-project scheduled-task locks, agent state, etc.
+# It's user/host-specific and not part of the codebase.
+.claude/
+
 # ---- OS ----
 Thumbs.db
 Desktop.ini
@@ -43,6 +48,16 @@ Desktop.ini
 # design/60-roadmap.md M0; the actual symlink tree is not checked in.
 /rust/tests/fixtures/
 
+# ---- Ad-hoc debug captures from manual asb-relay / trace runs ----
+# These appear at the repo root when debugging live wire issues with
+# `examples/asb-relay.rs` or `MX_ASB_TRACE_REPLY=1`. They're transient
+# per-session evidence — promote anything worth keeping into
+# `captures/` or `analysis/` instead.
+/rust-cs.txt
+/rust-sc.txt
+/rust.log
+/rust-trace-*.txt
+
 # ---- Plan files (project-local Claude Code plan staging) ----
 # These live under the user's ~/.claude/plans/ scope but appear at the
 # project root if accidentally created.