docs: reposition RTK as agent-agnostic

[FlorianBruniaux]

Summary

• Intro paragraph: clarifies RTK works with any AI coding agent, not Claude-only
• Token Savings header: "Claude Code Session" → "Coding Session"
• Quick Start: two-path structure — any agent first, Claude Code hook second
• How It Works diagram: "Claude" → "Agent" in ASCII art
• Auto-Rewrite Hook: adds "(Claude Code)" qualifier + agent-agnostic framing
• Applied consistently to all 6 language files (EN, FR, ZH, JA, KO, ES)

Side-fixed: version refs 0.27.1 → 0.27.2, module count 57 → 58 (pre-existing drift caught by pre-push hook).

Motivation

RTK is agent-agnostic by design but the README implied Claude Code exclusivity. A non-Claude-Code user should understand RTK works for them within 10 seconds. Claude Code remains the highlighted integration (hook advantage preserved), but without false exclusivity claims.

Test plan

• Read flow: tagline → intro (agent-agnostic) → token savings → quick start (2 paths) → how it works → commands
• Grep for "Claude Code" references that imply RTK is Claude-only (none should remain in intro/hero)
• Verify all 6 language files updated consistently
• Validate-docs passes (confirmed locally)

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR repositions RTK documentation to present the tool as agent-agnostic rather than Claude Code-specific. All 6 language README files (EN, FR, ZH, JA, KO, ES) plus CLAUDE.md and ARCHITECTURE.md are updated consistently. Side-fixes update version references from 0.27.1 → 0.27.2 and the module count from 57 → 58.

Changes:

• Intro paragraphs, token savings headers, Quick Start sections, and How It Works ASCII diagrams across all 6 language README files updated to use agent-neutral language ("Claude" → "Agent", "Claude Code Session" → "Coding Session")
• Quick Start restructured into two paths: direct usage with any agent first, then Claude Code auto-rewrite hook second, with a summary sentence preserving Claude Code as the highlighted integration
• Version references updated to 0.27.2 in CLAUDE.md and ARCHITECTURE.md, and module count updated to 58 in ARCHITECTURE.md

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
README.md	Agent-agnostic intro, Quick Start two-path structure, diagram update, Auto-Rewrite Hook section gets "(Claude Code)" qualifier, version 0.27.2
README_fr.md	French translation matching all agent-agnostic changes
README_zh.md	Chinese translation matching all agent-agnostic changes
README_ja.md	Japanese translation matching all agent-agnostic changes
README_ko.md	Korean translation matching all agent-agnostic changes
README_es.md	Spanish translation matching all agent-agnostic changes
CLAUDE.md	Version reference updated to 0.27.2
ARCHITECTURE.md	Version reference updated to 0.27.2, module count updated to 58

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[KuSh]

Some commands are still Claude Code only:

• cc-economics
• discover
• learn

❯ rtk discover
Error: Claude Code projects directory not found: /home/user/.claude/projects
Make sure Claude Code has been used at least once.

They should be marked as such now that README says it is agent-agnostic

[pszymkowiak]

Great work on the agent-agnostic repositioning — this is the right direction. The translations are consistent and well done.

Two things before we can merge:

1. Drop CLAUDE.md and ARCHITECTURE.md changes — version numbers are managed by release-please. Only keep the README changes.
2. Rebase on master and add DCO sign-off:

   git fetch upstream master
   git rebase upstream/master
   git commit --amend -s --no-edit
   git push --force-with-lease

Also please enable "Allow edits from maintainers" on this PR so we can help if needed.

[KuSh]

Last thing, the rewrite with its associated hook is Claude only. The classic CLAUDE.md still use the old rtk way

[pszymkowiak]

Hi! Thanks for the contribution! Since March 6, all PRs should target the develop branch instead of master (see CONTRIBUTING.md).

Could you update the base branch? Click Edit at the top right of this PR and change it from master to develop.

Thanks!