refactor: make skill bodies harness-neutral across the golang-* plugin (#93)

* docs: broaden compatibility base string across all golang-* skills

Replace "Claude Code or similar AI coding agents" with "Claude Code,
Codex or similar harness" per the cross-harness portability rule in
CLAUDE.md, mirroring samber/cc-skills-golang#91.

* feat: scope Go-file skills with the paths frontmatter field

Adds the optional paths frontmatter field (documented in
samber/cc-skills-golang#91) to every skill whose subject matter is
Go source itself, so Cursor can sharpen triggering to **/*.go files.
Skills not tied to a file type (setup, CI, ecosystem-lookup,
orchestrator) are intentionally left without it.

golang-lint also scopes to .golangci.yml, since linter configuration
is as central to that skill as the Go source it lints.

* docs: drop hardcoded Agent-tool phrasing from skill body prose

Continues the cross-harness portability rule from
samber/cc-skills-golang#91 — sub-agent fan-out is a capability every
harness resolves its own way; naming Claude Code's Agent tool in body
prose is redundant on Claude Code and dead weight elsewhere.

* feat(golang-how-to): flatten Configure mode to 5 harnesses, fix Cursor bug

Configure mode previously wrote to CLAUDE.md, AGENTS.md,
.cursor/rules, and copilot-instructions.md with Claude Code framed as
the primary target. This flattens the harness list to equal standing
and adds GEMINI.md (Gemini CLI, Antigravity).

Fixes a real bug: .cursor/rules is a directory of .mdc files with
their own YAML frontmatter, not a single markdown file to grep and
append to. The old Step 2/4 logic assumed the latter and would not
have worked on Cursor. Adds a dedicated .mdc template
(assets/cursor-go-skills.mdc) and a Cursor-specific write path.

Also adds the new Questions top-of-body directive and drops the
remaining hardcoded AskUserQuestion/Glob/Edit tool names from
project-config.md and golang-project-layout's checklist, per the
cross-harness portability rule in samber/cc-skills-golang#91.

* docs(golang-continuous-integration): label CI review blocks as generated artifacts

Notes that the Claude Code and Copilot review blocks under
'AI-Driven Code Review' are generated artifacts targeting a CI
runner, not the developer's local harness — their literal tool names
and permission flags are intentional under the exemption in
samber/cc-skills-golang#91, so a future portability grep hit there
reads as expected rather than as a miss.

* docs: lead Thinking/Orchestration mode directives with universal instruction

Rewords the 8 Thinking mode and 12 Orchestration mode directives across
these skills to lead with the harness-neutral instruction ("Reason as
thoroughly as possible...", "Fan out N parallel sub-agents...") and
mention ultrathink/ultracode second, as the Claude Code-specific
accelerator rather than the instruction itself. Also drops the
remaining hardcoded "(via the Agent tool)"/"(Agent tool)" parentheticals
and EnterWorktree/ExitWorktree tool-name mentions from body prose in
favor of "an isolated worktree" — the tool stays declared in
allowed-tools, prose just describes the capability.

Mirrors the format adopted in samber/cc-skills-golang#91.

* docs: add Questions directive to golang-refactoring and golang-modernize

golang-refactoring gates several irreversible git operations behind
explicit sign-off (initial plan approval, then per-checkpoint mid-
refactor pauses). Adds a top-of-body Questions directive naming the
mechanism once, and removes a verbatim-duplicated 5-item checkpoint
list between SKILL.md and references/workflow.md — workflow.md now
points back to SKILL.md's list instead of restating it.

golang-modernize already had an ad hoc "Consent check" block for its
contextual-trigger mode, placed after the first heading rather than
with the other top-of-body directives. Renames it to the Questions
directive and moves it up next to Persona/Orchestration mode/Modes,
consistent with the convention in samber/cc-skills-golang#91.

* docs(golang-gopls): generalize MCP registration and settings storage

The MCP registration section named only Claude Code's 'claude mcp add'
command with no acknowledgement that gopls mcp is a harness-agnostic
launch command any MCP-capable host can point at. Notes the underlying
command is portable and that other harnesses use their own settings
file rather than a shared config format.

Also drops a stray 'Store the settings in CLAUDE.md' pointer for
gopls's editor-agnostic LSP settings — there was no reason that one
was Claude Code-only.

* chore: bump metadata.version on every skill touched by this branch

Patch bump per CLAUDE.md's version-discipline rule — no plugin
manifest version change, per standing preference to leave
.claude-plugin/plugin.json, .cursor-plugin/plugin.json, and
gemini-extension.json untouched for skill-level updates.

* docs: refresh README token counts for all touched skills

Re-measured Description/SKILL.md/Directory token counts via
tiktoken-cli after the cross-harness portability changes across all
46 golang-* skills.

* Revert "chore: bump metadata.version on every skill touched by this branch"

This reverts commit 28e6c898f0.

* docs(golang-gopls): name CLAUDE.md/AGENTS.md explicitly

Generic 'the project's agent-config file' phrasing lost the concrete
examples the equivalent line elsewhere in the repo keeps. Names the
two most common files while keeping 'or equivalent' for the rest.

skills/golang-grpc/SKILL.md

@@ -3,7 +3,7 @@ name: golang-grpc
 description: "Provides gRPC usage guidelines, protobuf organization, and production-ready patterns for Golang microservices. Use when implementing, reviewing, or debugging gRPC servers/clients, writing proto files, setting up interceptors, handling gRPC errors with status codes, configuring TLS/mTLS, testing with bufconn, or working with streaming RPCs."
 user-invocable: true
 license: MIT
-compatibility: Designed for Claude Code or similar AI coding agents, and for projects using Golang.
+compatibility: Designed for Claude Code, Codex or similar harness, and for projects using Golang.
 metadata:
   author: samber
   version: "1.1.7"
@@ -19,6 +19,8 @@ metadata:
         formula: protobuf
         bins: [protoc]
 allowed-tools: Read Edit Write Glob Grep Bash(go:*) Bash(golangci-lint:*) Bash(git:*) Agent WebFetch mcp__context7__resolve-library-id mcp__context7__query-docs Bash(protoc:*) AskUserQuestion Bash(godig:*) Bash(gopls:*) LSP mcp__gopls__*
+paths:
+  - "**/*.go"
 ---
 
 **Persona:** You are a Go distributed systems engineer. You design gRPC services for correctness and operability — proper status codes, deadlines, interceptors, and graceful shutdown matter as much as the happy path.