docs: Z.AI GLM Coding Plan setup for Claude providers

[FelipeMayerDev]

Adds a Z.AI section to the Claude providers guide, mirroring the existing OpenRouter walkthrough.

Z.AI's GLM Coding Plan exposes a Claude-compatible endpoint, so it is the same mechanism the guide already documents: a Claude provider instance with environment variables (ANTHROPIC_BASE_URL=https://api.z.ai/api/anthropic, ANTHROPIC_AUTH_TOKEN, API_TIMEOUT_MS), plus optional GLM model-role mapping and common mistakes.

Docs-only; no code.

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Note

Low Risk
Documentation-only change with no runtime, auth, or data-handling impact.

Overview
Adds user documentation for routing Claude Code through Z.AI's GLM Coding Plan via a dedicated Claude provider (same pattern as the existing OpenRouter section).

The new section in providers-claude.md covers provider settings (CLAUDE_CONFIG_DIR, display name), required env vars (ANTHROPIC_BASE_URL, ANTHROPIC_AUTH_TOKEN, API_TIMEOUT_MS), optional GLM model-role mappings, /status verification, logout/isolation notes, and a common mistakes list with a link to Z.AI's upstream Claude Code guide.

^{Reviewed by Cursor Bugbot for commit b3660c7. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Add Z.AI GLM Coding Plan setup guide to Claude provider docs

Adds a new 'I Want To Use Z.AI (GLM Coding Plan)' section to providers-claude.md. Covers environment variables (ANTHROPIC_BASE_URL, ANTHROPIC_AUTH_TOKEN, API_TIMEOUT_MS), separate Claude home directory setup, default model role mapping to GLM model IDs (glm-4.7 and glm-4.5-air), a common mistakes checklist, and a link to Z.AI's upstream guide.

^{Macroscope summarized b3660c7.}

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[macroscopeapp]

Approvability

Verdict: Approved at b3660c7

Macroscope's review found this PR approvable — This PR adds a self-contained Z.AI setup section to an existing Claude provider guide and changes no executable code, configuration, authentication handling, or production behavior. Its impact is limited to rendered documentation and user-directed setup instructions.

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[FelipeMayerDev]

Superseded by #8583 (combined PR).