chore: release 0.12.8, begin 0.12.9.dev0 development (#3410)

* chore: bump version to 0.12.8

* chore: begin 0.12.9.dev0 development

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -2,6 +2,21 @@
 
 <!-- insert new changelog below this comment -->
 
+## [0.12.8] - 2026-07-08
+
+### Changed
+
+- [extension] Add LLM Wiki extension to community catalog (#3361)
+- Docs: Document missing CLI flags and integrations (#3182)
+- Docs: Remove Cursor from CLI check list in README (#3184)
+- feat(extensions): port update-agent-context to Python (#3387)
+- fix(scripts): fall through to grep/sed when python3 is a broken stub in feature.json parser (#3312)
+- fix(toml): escape control characters so generated command files parse (#3341)
+- fix(cli): exit cleanly on malformed IPv6 URLs in `extension`/`preset`/`workflow add` (#3369)
+- fix(github-http): return None on malformed GHES port instead of raising (#3379)
+- fix(integrations): guard _sha256 against unreadable managed files (#3376)
+- chore: release 0.12.7, begin 0.12.8.dev0 development (#3398)
+
 ## [0.12.7] - 2026-07-07
 
 ### Changed

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "specify-cli"
-version = "0.12.8.dev0"
+version = "0.12.9.dev0"
 description = "Specify CLI, part of GitHub Spec Kit. A tool to bootstrap your projects for Spec-Driven Development (SDD)."
 readme = "README.md"
 requires-python = ">=3.11"