chore(cargo): bump version to 0.8.0

CHANGELOG.md

@@ -7,6 +7,43 @@ and this project adheres to pre-1.0 [Semantic Versioning](https://semver.org/).
 
 ## [Unreleased]
 
+## [0.8.0] - 2026-02-28
+
+### Added
+
+- `--exact` flag for `piano build` and `piano profile`: exact-match mode for `--fn`, mirroring `cargo test -- --exact` convention (#120)
+- `--list-skipped` flag for `piano build` and `piano profile`: list functions that Piano cannot instrument (const, unsafe, extern) with file paths and reasons; prints "no functions skipped" when all functions are instrumentable (#137, #186, #192)
+- `piano tag` with no arguments lists all saved tags; `piano tag <name>` saves (#175)
+- `piano diff` with no arguments compares the two most recent runs, showing "comparing: X vs Y" with tag names or relative timestamps (#125)
+- User labels as diff column headers: tag names, filename stems, or relative timestamps instead of generic "Before"/"After" (#124)
+- Auto-detect project root by walking up from cwd to find Cargo.toml, removing the need for `--project` in most cases (#135)
+- Structural color in report tables: bold headers, dim separators, full NO_COLOR/CLICOLOR/CLICOLOR_FORCE/TERM=dumb support via anstream (#122)
+- Recovery guidance in NoTargetsFound errors: shows similar function names via edit distance, or lists all available functions (#127)
+- UX design principles documented in docs/standards/ux.md
+
+### Fixed
+
+- Diff table sorted by absolute self-time delta descending instead of alphabetically (#193)
+- Duplicate error message on NoTargetsFound when all matched functions were skipped (#191)
+- Missing tag produces "no run found for tag '...'" instead of leaking internal file paths (#198)
+- Internal staging/tempdir paths removed from all user-facing error messages (#129)
+- Cascading NoRuns error suppressed when profiled program exits non-zero (#139)
+- `--fn` substring matching now checks qualified names (Type::method), not just bare names (#185)
+- Stale tags produce RunNotFound with recovery guidance instead of generic NoRuns (#160)
+- Non-printable characters in tag names displayed safely in error messages (#166)
+- Redundant "invalid tag:" prefix removed from tag validation errors (#165)
+- Run ID removed from tag confirmation message (#126)
+- Concurrency warning simplified to one line per function (#138)
+- Invalid tag error defines the valid character set instead of listing what's invalid (#128)
+- App name shown in build output instead of internal binary path (#121)
+- `--fn` help text harmonized between build and profile commands (#123)
+
+### Changed
+
+- Report columns reordered: Function | Self | Calls | Allocs | Alloc Bytes (self-time leads, Total removed from default view) (#180, #136)
+- Runtime exits non-zero on profiling data write failure instead of silently discarding
+- Runs directory pre-created before instrumented build to prevent write failures
+
 ## [0.7.0] - 2026-02-27
 
 ### Added

Cargo.toml

@@ -3,7 +3,7 @@ members = ["piano-runtime"]
 
 [package]
 name = "piano"
-version = "0.7.0"
+version = "0.8.0"
 edition = "2024"
 rust-version = "1.88"
 description = "Automated instrumentation-based profiling for Rust"

docs/standards/releases.md

@@ -39,8 +39,8 @@ Batch related changes, release when there's a meaningful set of user-facing chan
 6. Bump version in both `Cargo.toml` and `piano-runtime/Cargo.toml`
 7. Run `cargo generate-lockfile --ignore-rust-version` (without this flag, cargo constrains all workspace deps to the lowest member MSRV, downgrading shared dependencies like clap)
 8. Commit: `chore(cargo): bump version to 0.x.y` -- this commit may only touch `Cargo.toml`, `piano-runtime/Cargo.toml`, and `Cargo.lock` (CI enforces this on `release/*` PRs)
-9. Tag: `git tag v0.x.y`
-10. Push: `git push && git push --tags`
+9. Open a PR (`release/v0.x.y` branch) -- main has branch protection, even version bumps go through a PR
+10. After merge, tag the merge commit: `git tag v0.x.y` and `git push --tags`
 11. Publish `piano-runtime` first: `cargo publish -p piano-runtime`
 12. Wait for crates.io to index, then publish `piano`: `cargo publish -p piano`
 13. Close the milestone on GitHub (if applicable)

piano-runtime/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "piano-runtime"
-version = "0.7.0"
+version = "0.8.0"
 edition = "2021"
 rust-version = "1.59"
 description = "Zero-dependency timing and allocation tracking runtime for piano profiler"