docs: reframe README as open context layer

[goldmedal]

Summary

• Reposition WrenAI in the README as an open context layer for AI agents instead of just a semantic engine — broader narrative that better captures what the project provides to MCP clients and agents.
• Updates: H1 title, intro paragraph, and the core/ row in the repository map.

Test plan

• Render the README on GitHub and confirm wording reads naturally.
• Verify links in the changed lines still resolve.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Documentation
  • Updated project branding to "Open Context Layer" and refined description to clarify support for MCP clients and AI agents
  • Announced Wren Engine integration into the repository

[coderabbitai]

Walkthrough

README documentation is updated to rebrand "Open Context Engine" as "Open Context Layer," adjust descriptions to emphasize MCP clients and AI agents, announce the Wren Engine merge into core/, and note archival details for prior repositories.

Changes

Documentation & Branding Update

Layer / File(s)	Summary
Main Tagline README.md (lines 5–8)	Project title changes from "WrenAI — Open Context Engine for AI Agents" to "WrenAI — Open Context Layer for AI Agents".
Project Description README.md (lines 42–43)	Main descriptive paragraph reworded to emphasize context layer and explicit mention of MCP clients and AI agents instead of semantic engine language.
Merger Announcement README.md (lines 40–42)	2026-05-07 announcement added: Wren Engine merged into core/; prior Canner/wren-engine repo archived; legacy WrenAI GenBI app preserved at legacy/v1 (tag v1-final).
Repository Map README.md (line 95)	core/ directory description updated from "semantic SQL machinery" to "context layer's core machinery."

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• Update README.md #1206: README-only edits updating project branding and messaging (tagline and mission).
• update readme with Wren AI API #1604: README modifications adding or updating references to Wren/Wren AI and embedded AI features.
• update readme #1102: README changes updating project branding and referencing Wren's merger and role.

Suggested reviewers

• wwwy3y3
• cyyeh

Poem

🐰 A context layer blooms, no longer an engine's hum,
Wren's merger calls home, the archive's last drum.
MCP clients gather 'round, AI agents unite,
New branding, fresh words—README shines bright! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically reflects the main change: updating the README to reframe the project as an 'open context layer' rather than describing it as a semantic engine.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/udpate-readme

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[coderabbitai]

🧹 Nitpick comments (1)

README.md (1)

43-43: ⚡ Quick win

Expand “MCP” on first mention for newcomer clarity.

At Line 43, consider “Model Context Protocol (MCP)” the first time it appears, then use MCP afterward.

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@README.md` at line 43, Update the first occurrence of the acronym "MCP" in
the README sentence that starts "WrenAI is an open-source context layer for MCP
clients and AI agents" to expand it as "Model Context Protocol (MCP)" and leave
subsequent uses as "MCP" so newcomers see the full term on first mention while
preserving the acronym elsewhere.

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Nitpick comments:
In `@README.md`:
- Line 43: Update the first occurrence of the acronym "MCP" in the README
sentence that starts "WrenAI is an open-source context layer for MCP clients and
AI agents" to expand it as "Model Context Protocol (MCP)" and leave subsequent
uses as "MCP" so newcomers see the full term on first mention while preserving
the acronym elsewhere.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: fbb7e01f-c6ad-4e5c-b47f-b93b52df6ea9

📥 Commits

Reviewing files that changed from the base of the PR and between c502541 and fcaa4b8.

📒 Files selected for processing (1)

• README.md