feat: extract @wraith-protocol/sdk-agent companion package (#185)

[lamborghini21]

Extracts agent functionality (Wraith, WraithAgent, Chain, Claude tools) into a separate @wraith-protocol/sdk-agent package to reduce root bundle size and improve API surface. Root package now provides deprecated compatibility shims for backward compatibility.

• Create packages/sdk-agent/ with client.ts, tools.ts, types.ts
• Move agent tests to packages/sdk-agent/test/
• Update examples to use new @wraith-protocol/sdk-agent package
• Add compatibility shims in src/agent/ with deprecation warnings
• Update root package.json exports to include agent entry point
• Configure tsup to mark @wraith-protocol/sdk-agent as external
• Add README for sdk-agent package with adapter shape documentation

Closes #185

[drips-wave]

@lamborghini21 Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits

[truthixify]

Thanks @lamborghini21. Same gate as a few other PRs this wave: test (20) and test (22) fail on pnpm api:check, not on a test.

Moving src/agent/ out to packages/sdk-agent/ changes what the root entry exports, which is exactly the kind of change the api-extractor baseline exists to catch, so it needs regenerating:

pnpm build
git add etc/
git commit -m "chore: refresh api-extractor baseline"
git push

Given this PR is specifically about shrinking the root bundle, it is worth eyeballing the regenerated etc/sdk.api.md diff rather than just committing it. The agent symbols should be leaving the root surface, and if they are still there the compatibility shim is re-exporting more than intended.

[lamborghini21]

Thanks @lamborghini21. Same gate as a few other PRs this wave: test (20) and test (22) fail on pnpm api:check, not on a test.

Moving src/agent/ out to packages/sdk-agent/ changes what the root entry exports, which is exactly the kind of change the api-extractor baseline exists to catch, so it needs regenerating:

pnpm build
git add etc/
git commit -m "chore: refresh api-extractor baseline"
git push

Given this PR is specifically about shrinking the root bundle, it is worth eyeballing the regenerated etc/sdk.api.md diff rather than just committing it. The agent symbols should be leaving the root surface, and if they are still there the compatibility shim is re-exporting more than intended.

Thank you for the insight.

Please check once again.

[truthixify]

Went conflicted just now because #191 and #192 landed ahead of it. Nothing wrong with your work, it was mergeable minutes ago.

git fetch origin
git rebase origin/develop

I checked the api surface diff before the conflict appeared and the agent symbols do leave the root, so the extraction is doing what it should rather than just re-exporting.

[lamborghini21]

Went conflicted just now because #191 and #192 landed ahead of it. Nothing wrong with your work, it was mergeable minutes ago.

git fetch origin
git rebase origin/develop

I checked the api surface diff before the conflict appeared and the agent symbols do leave the root, so the extraction is doing what it should rather than just re-exporting.

okay