Fix documentation inconsistencies and bump document versions

Claude/skills/changelog/SKILL.md

@@ -1,6 +1,8 @@
 ---
 name: changelog
 description: Updates changelog in project
+metadata:
+  version: v2
 ---
 
 Take known info and make changes to CHANGELOG.md to make them up-to-date.

Claude/skills/check/SKILL.md

@@ -1,5 +1,7 @@
 ---
 name: check
 description: Check for failed tests
+metadata:
+  version: v1
 ---
 Try running tests and investigate failed results

Claude/skills/commit/SKILL.md

@@ -1,6 +1,8 @@
 ---
 name: commit
 description: Updates changelog and proposes a concise verbal git commit message
+metadata:
+  version: v2
 ---
 
 1. Run the changelog skill: read git log and staged changes, then update CHANGELOG.md accordingly (same as /changelog).
@@ -9,4 +11,5 @@ description: Updates changelog and proposes a concise verbal git commit message
    - Concise, verbal style — e.g. "Add X", "Fix Y", "Refactor Z"
    - NOT filename-style — never "update_something.py" or "changes to foo"
    - In English
+   - **No AI authorship** — never append `Co-Authored-By: Claude`, a "Generated with …" line, or any tool signature or emoji footer. The same applies to pull request descriptions.
    - Do NOT run git commit — only propose the message and wait for user confirmation.

Claude/skills/documentation/SKILL.md

@@ -1,5 +1,7 @@
 ---
 name: documentation
 description: Updates documentation in project
+metadata:
+  version: v1
 ---
 Create or update documentation of project in docs/ folder. Documentation should contain description of each part of program and documentation of each function. Separate documents for each module. Write in markdown format.

Claude/skills/documentation_context/SKILL.md

@@ -1,6 +1,8 @@
 ---
-name: context
+name: documentation_context
 description: Compress docs/ into CONTEXT.md at project root — minimum tokens, lossless
+metadata:
+  version: v2
 ---
 
 Read every `.md` file in `docs/`. Generate `CONTEXT.md` at the project root.