fix(claude-api): replace dead URLs in academy-guide and tool-use-concepts - #1730

Rebased onto the latest main to resolve the conflict in skills/claude-api/shared/live-sources.md.

What conflicted and how it was resolved

• Since this PR was opened, main already fixed the same dead links in live-sources.md: Pricing → about-claude/pricing.md, Computer Use → tool-use/computer-use-tool.md, Skills → agent-skills/overview.md, and the Anthropic CLI → cli-sdks-libraries/cli/quickstart.md. It also added new rows and extended the Computer Use and CLI extraction prompts. I kept main's version of that file entirely, so the PR no longer touches it.
• The PR now contains only the two fixes main doesn't have yet:
  • skills/academy-guide/SKILL.md: academy.claude.com/resources → academy.claude.com/all (2 places)
  • skills/claude-api/shared/tool-use-concepts.md: the agents-and-tools/computer-use/overview link → agents-and-tools/tool-use/computer-use-tool
• I re-checked every URL in the three touched files with curl -L: all return 200 except an unrelated placeholder in a code example. academy.claude.com/resources is still a 404, and the replacement URLs return 200. I also updated the PR title and description to match, since the PR no longer touches live-sources.md.

Tests: the repo has no CI, linter or test suite for these markdown skills (no CONTRIBUTING file). I only ran the URL checks above and git diff --check.

Reviewed at head 7e5fddffbe.

Scope: Rebased version of the #1698 dead-URL fix — 3 replacements across 2 files: academy.claude.com/resources → academy.claude.com/all (both call sites in skills/academy-guide/SKILL.md) and agents-and-tools/computer-use/overview → agents-and-tools/tool-use/computer-use-tool in skills/claude-api/shared/tool-use-concepts.md. shared/live-sources.md is no longer touched; the diff contains no other changes.

Verified:

• Replacement URLs are live: https://academy.claude.com/all returns 200 ("All resources · Claude Academy", includes a search UI — consistent with the surrounding "searchable library" pointer); https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool returns 200 with canonical + h1 "Computer use tool" and contains the batch-actions / computer_20251124 material the section promises.
• Original URLs are dead: academy.claude.com/resources → hard 404; agents-and-tools/computer-use/overview → client-side "Page not found" (soft 404 that still answers HTTP 200 — confirmed by rendering it in a real browser, so a plain status check alone can be misleading here).
• Rebase resolution is clean: skills/claude-api/shared/live-sources.md at this head is byte-identical to current origin/main (empty diff), so nothing from main's rewrite was lost or altered.
• No leftover references: the two academy-guide call sites are the only /resources links in that file, and no other computer-use/overview reference remains in the repo. git diff --check is clean.

Conclusion: LGTM. Replacement links verified live at the head, both replacements are semantically faithful to the surrounding text, and the reduced rebased scope is correct. Safe to merge.