phase0: dry run — comrak & tokei vendored, 3 attempts in ledger

Target selection (SPEC §6): comrak 0.53.0 (45c1995, BSD-2-Clause) and
tokei 14.0.0 (fa44e51, MIT/Apache-2.0); both CPU-bound with pinned
corpora (progit book 11MB; 8x replicated pinned trees, 221MB) and
committed MANIFEST.sha256 + golden-output pins + regen scripts.

Calibration: A/A null verdicts on both real workloads; taskset -c 2
pinning tightens the A/A CI from [0.938, 1.008] to [0.993, 1.008],
making the 2% accept threshold meaningful in this container.

Profiles (callgrind; perf unavailable): comrak allocator symbols 26.7%
of Ir; tokei perform_multi_line_analysis 31.7%.

Attempts (ledger + results/phase0/):
- comrak class-1 target-cpu=native: null [0.983, 1.011], rejected-bench
- comrak class-2 mimalloc swap: +4.6% [1.033, 1.058], 848 upstream
  tests green, golden byte-identical, ASan-proper clean; LSan flags
  484B in onig (reachability false-positive analysis in case study) ->
  needs-human-review per SPEC §8
- tokei class-1 fat LTO+cgu=1: +1.6% [1.003, 1.026], real but under
  the 2% bar, rejected-bench

Also: ledger-cli for manual rows, targets/ excluded from trust-layer
workspace, corpora/build artifacts gitignored, case study written.
Phase 0 exit criteria (>=10% verified win) not yet met; next
hypotheses logged in results/phase0/attempts.md.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EcKPWQ3MQD4NdEHwar96u2

targets/tokei/target.toml

@@ -0,0 +1,23 @@
+# tokei — source-code statistics tool (Rust)
+# Selection vs SPEC §6: CPU-bound line/language analysis (83% user time,
+# single-threaded mode); upstream test suite; scriptable deterministic
+# workload; MIT OR Apache-2.0; active, no dedicated perf team.
+
+[source]
+repo = "https://github.com/XAMPPRocky/tokei.git"
+commit = "fa44e5194060305576514d59b850353643afbfc8"   # v14.0.0
+license = "MIT OR Apache-2.0"
+
+[build]
+baseline = "cargo build --release --manifest-path workspace/Cargo.toml"
+binary = "workspace/target/release/tokei"
+
+[bench]
+# Single rayon thread: measurement first (SPEC conventions); the
+# multi-thread mode is a playbook class-7 concern, not the baseline.
+command = "RAYON_NUM_THREADS=1 {binary} --sort code corpora/tokei/input > /dev/null"
+workload = "8 replicas of pinned progit + comrak/src trees, 221 MB, 4360 files, single rayon thread"
+
+[gates]
+tests = "cargo test --release --manifest-path workspace/Cargo.toml"
+golden = "RAYON_NUM_THREADS=1 {binary} --sort code corpora/tokei/input"