chore: release 0.12.0, begin 0.12.1.dev0 development (#3243)

* chore: bump version to 0.12.0

* chore: begin 0.12.1.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 -->
 
+## [0.12.0] - 2026-06-29
+
+### Changed
+
+- feat: make agent-context extension a full opt-in (#3097)
+- docs(workflows): add the built-in 'init' step type to the Step Types table (#3234)
+- fix(workflows): gate validate() must not crash on non-string options (#3233)
+- fix(workflows): make pipe-filter detection quote-aware in expressions (#3232)
+- fix(workflows): reject a fan-in wait_for that names an unknown step at validation (#3225)
+- fix(scripts): warn when spec template is missing in create-new-feature.ps1 (parity with bash) (#3230)
+- fix(scripts): count subdirectory-only dirs as non-empty in PowerShell (parity with bash) (#3137)
+- fix(scripts): drop HAS_GIT from PowerShell git-extension output (parity with bash) (#3195)
+- Update Product Spec Extension to v1.0.1 (#3226)
+- chore: release 0.11.10, begin 0.11.11.dev0 development (#3240)
+
 ## [0.11.10] - 2026-06-29
 
 ### Changed

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "specify-cli"
-version = "0.11.11.dev0"
+version = "0.12.1.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"