build: require go 1.25 (chroma v2.27) and align release workflow

.github/workflows/release.yml

@@ -39,7 +39,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.24'
+          go-version: '1.25'
 
       - name: Install cross-compilation tools
         run: |

docs/superpowers/plans/task-12-report.md

@@ -0,0 +1,78 @@
+# Task 1 & 2 Implementation Report — Multi-Line Comment Support (chroma)
+
+## Files created
+
+- `internal/processor/engine.go` — `Options`, `LineChange`, `resolveLexer`, `shouldDrop`, `isCommentType`, `leadingWhitespace` (Task 1), then `StripComments`, `legacyStrip`, `changed` (Task 2).
+- `internal/processor/engine_test.go` — `TestResolveLexer`, `TestShouldDrop` (Task 1), then `TestStripComments` (Task 2).
+
+## Files modified
+
+- `go.mod` — added `github.com/alecthomas/chroma/v2 v2.27.0` as a direct dependency (also pulled in `github.com/dlclark/regexp2/v2` as indirect). `go get` + `go mod tidy` bumped the `go` directive from `1.24.4` to `1.25` (local toolchain is go1.26.4; this was an automatic side effect of dependency resolution, not a manual edit).
+- `go.sum` — updated accordingly.
+
+No other files were touched. No code comments (`//`, `#`, block, or doc) were added anywhere; the only `//` sequences in the diff are inside Go string literals in test fixture data (e.g. `"z(); // a /* b\nw();\n"`), not actual comments.
+
+## Task 1 verification
+
+- Red: `go test ./internal/processor -run 'TestResolveLexer|TestShouldDrop'` failed with `undefined: resolveLexer` / `undefined: Options` / `undefined: shouldDrop` before `engine.go` existed.
+- Green: same command passed after `engine.go` was created.
+
+## Task 2 verification
+
+Red: `go test ./internal/processor -run TestStripComments` failed with `undefined: StripComments` before `StripComments`/`legacyStrip`/`changed` were added.
+
+Green — `go test ./internal/processor -run TestStripComments -v`:
+
+```
+=== RUN   TestStripComments
+=== RUN   TestStripComments/multiline_block_collapses
+=== RUN   TestStripComments/inline_block_both_sides_kept
+=== RUN   TestStripComments/preproc_kept_comment_dropped
+=== RUN   TestStripComments/unterminated_block_to_eof
+=== RUN   TestStripComments/marker_inside_line_comment_inert
+=== RUN   TestStripComments/raw_string_preserved
+=== RUN   TestStripComments/string_marker_preserved
+=== RUN   TestStripComments/preserve_pattern_keeps_line
+=== RUN   TestStripComments/preserve-lines_blanks_comment-only
+=== RUN   TestStripComments/inline_flag_keeps_block
+=== RUN   TestStripComments/block_flag_keeps_line
+=== RUN   TestStripComments/straddle_block_kept
+=== RUN   TestStripComments/range_block_removed_when_fully_inside
+--- PASS: TestStripComments (0.03s)
+    --- PASS: TestStripComments/multiline_block_collapses (0.00s)
+    --- PASS: TestStripComments/inline_block_both_sides_kept (0.00s)
+    --- PASS: TestStripComments/preproc_kept_comment_dropped (0.00s)
+    --- PASS: TestStripComments/unterminated_block_to_eof (0.00s)
+    --- PASS: TestStripComments/marker_inside_line_comment_inert (0.00s)
+    --- PASS: TestStripComments/raw_string_preserved (0.00s)
+    --- PASS: TestStripComments/string_marker_preserved (0.00s)
+    --- PASS: TestStripComments/preserve_pattern_keeps_line (0.00s)
+    --- PASS: TestStripComments/preserve-lines_blanks_comment-only (0.01s)
+    --- PASS: TestStripComments/inline_flag_keeps_block (0.00s)
+    --- PASS: TestStripComments/block_flag_keeps_line (0.00s)
+    --- PASS: TestStripComments/straddle_block_kept (0.00s)
+    --- PASS: TestStripComments/range_block_removed_when_fully_inside (0.00s)
+PASS
+ok  	github.com/carlosarraes/shush/internal/processor	0.038s
+```
+
+All 13 subtests passed on the first implementation attempt — no engine-code fixes were needed against the plan's expected values.
+
+## `make check` result
+
+Run after both Task 1 and Task 2 (gate before each commit). Both runs exited `0` (fmt + vet + test all clean), including the pre-existing `TestWholeFile` single-line golden suite (all 17 subtests green) and the full existing `cmd/shush`, `internal/git`, `internal/processor` suites.
+
+```
+exit=0
+...
+ok  	github.com/carlosarraes/shush/cmd/shush	...
+ok  	github.com/carlosarraes/shush/internal/git	...
+ok  	github.com/carlosarraes/shush/internal/processor	...
+```
+
+## jj commits
+
+1. `81a729b169b6` — `feat(processor): add chroma dep, lexer resolution and drop rules`
+2. `8fac929fd266` — `feat(processor): StripComments chroma engine with legacy fallback`
+
+Working copy now at an empty change `e678a5935f74` on top of commit 2, ready for Task 3.