fix(slack): bound structured stream chunk fields

[dcbuild3r]

Summary

Slack limits structured task and plan fields to 256 characters. Truncate IDs, titles, and plan titles safely, and split oversized task details/output into stable continuation chunks so large tool results do not make native streaming fail. Preserve the prior part count on subsequent task updates so existing continuation cards can be updated consistently.

Test plan

• bunx vitest run packages/adapter-slack/src/index.test.ts (444 passed)
• bunx tsc -p packages/adapter-slack/tsconfig.json --noEmit
• bunx biome check on changed files

Checklist

• All commits are signed and verified
• All commits are signed off for the DCO (git commit -s)
• pnpm validate passes (targeted package validation run)
• Changeset added
• Documentation updated (N/A; automatic enforcement of Slack platform limits)

[vercel]

@dcbuild3r is attempting to deploy a commit to the Vercel Team on Vercel.

A member of the Team first needs to authorize it.

[vercel]

Suggested change

	constlastCode=value.charCodeAt(end-1);
	if(lastCode>=0xd800&&lastCode<=0xdbff){
	end-=1;
	// Only guard against splitting a surrogate pair when there is a following
	// code unit that would be separated. If `end` is already at the end of the
	// string, or decrementing would leave an empty segment, keep `end` as-is so
	// that `offset` always advances and the loop terminates.
	if(end<value.length&&end-1>offset){
	constlastCode=value.charCodeAt(end-1);
	if(lastCode>=0xd800&&lastCode<=0xdbff){
	end-=1;
	}

splitStreamChunkField enters an infinite loop when the input string ends with an unpaired high surrogate at the final chunk boundary, hanging the synchronous stream handler and blocking the Node event loop.

[dcbuild3r]

Summary

Slack limits structured task and plan fields to 256 characters. Truncate IDs, titles, and plan titles safely, and split oversized task details/output into stable continuation chunks so large tool results do not make native streaming fail. Preserve the prior part count on subsequent task updates so existing continuation cards can be updated consistently.

Test plan

• bunx vitest run packages/adapter-slack/src/index.test.ts (444 passed)
• bunx tsc -p packages/adapter-slack/tsconfig.json --noEmit
• bunx biome check on changed files

Checklist

• All commits are signed and verified
• All commits are signed off for the DCO (git commit -s)
• pnpm validate passes (targeted package validation run)
• Changeset added
• Documentation updated (N/A; automatic enforcement of Slack platform limits)

[vercel]

@dcbuild3r is attempting to deploy a commit to the Vercel Team on Vercel.

A member of the Team first needs to authorize it.

[vercel]

Suggested change

	constlastCode=value.charCodeAt(end-1);
	if(lastCode>=0xd800&&lastCode<=0xdbff){
	end-=1;
	// Only guard against splitting a surrogate pair when there is a following
	// code unit that would be separated. If `end` is already at the end of the
	// string, or decrementing would leave an empty segment, keep `end` as-is so
	// that `offset` always advances and the loop terminates.
	if(end<value.length&&end-1>offset){
	constlastCode=value.charCodeAt(end-1);
	if(lastCode>=0xd800&&lastCode<=0xdbff){
	end-=1;
	}

splitStreamChunkField enters an infinite loop when the input string ends with an unpaired high surrogate at the final chunk boundary, hanging the synchronous stream handler and blocking the Node event loop.

[dcbuild3r]

Summary

Slack limits structured task and plan fields to 256 characters. Truncate IDs, titles, and plan titles safely, and split oversized task details/output into stable continuation chunks so large tool results do not make native streaming fail. Preserve the prior part count on subsequent task updates so existing continuation cards can be updated consistently.

Test plan

• bunx vitest run packages/adapter-slack/src/index.test.ts (444 passed)
• bunx tsc -p packages/adapter-slack/tsconfig.json --noEmit
• bunx biome check on changed files

Checklist

• All commits are signed and verified
• All commits are signed off for the DCO (git commit -s)
• pnpm validate passes (targeted package validation run)
• Changeset added
• Documentation updated (N/A; automatic enforcement of Slack platform limits)

[vercel]

@dcbuild3r is attempting to deploy a commit to the Vercel Team on Vercel.

A member of the Team first needs to authorize it.

[vercel]

Suggested change

	constlastCode=value.charCodeAt(end-1);
	if(lastCode>=0xd800&&lastCode<=0xdbff){
	end-=1;
	// Only guard against splitting a surrogate pair when there is a following
	// code unit that would be separated. If `end` is already at the end of the
	// string, or decrementing would leave an empty segment, keep `end` as-is so
	// that `offset` always advances and the loop terminates.
	if(end<value.length&&end-1>offset){
	constlastCode=value.charCodeAt(end-1);
	if(lastCode>=0xd800&&lastCode<=0xdbff){
	end-=1;
	}

splitStreamChunkField enters an infinite loop when the input string ends with an unpaired high surrogate at the final chunk boundary, hanging the synchronous stream handler and blocking the Node event loop.

[dcbuild3r]

Summary

Slack limits structured task and plan fields to 256 characters. Truncate IDs, titles, and plan titles safely, and split oversized task details/output into stable continuation chunks so large tool results do not make native streaming fail. Preserve the prior part count on subsequent task updates so existing continuation cards can be updated consistently.

Test plan

• bunx vitest run packages/adapter-slack/src/index.test.ts (444 passed)
• bunx tsc -p packages/adapter-slack/tsconfig.json --noEmit
• bunx biome check on changed files

Checklist

• All commits are signed and verified
• All commits are signed off for the DCO (git commit -s)
• pnpm validate passes (targeted package validation run)
• Changeset added
• Documentation updated (N/A; automatic enforcement of Slack platform limits)

[vercel]

@dcbuild3r is attempting to deploy a commit to the Vercel Team on Vercel.

A member of the Team first needs to authorize it.

[vercel]

Suggested change

	constlastCode=value.charCodeAt(end-1);
	if(lastCode>=0xd800&&lastCode<=0xdbff){
	end-=1;
	// Only guard against splitting a surrogate pair when there is a following
	// code unit that would be separated. If `end` is already at the end of the
	// string, or decrementing would leave an empty segment, keep `end` as-is so
	// that `offset` always advances and the loop terminates.
	if(end<value.length&&end-1>offset){
	constlastCode=value.charCodeAt(end-1);
	if(lastCode>=0xd800&&lastCode<=0xdbff){
	end-=1;
	}

splitStreamChunkField enters an infinite loop when the input string ends with an unpaired high surrogate at the final chunk boundary, hanging the synchronous stream handler and blocking the Node event loop.

[dcbuild3r]

Summary

Slack limits structured task and plan fields to 256 characters. Truncate IDs, titles, and plan titles safely, and split oversized task details/output into stable continuation chunks so large tool results do not make native streaming fail. Preserve the prior part count on subsequent task updates so existing continuation cards can be updated consistently.

Test plan

• bunx vitest run packages/adapter-slack/src/index.test.ts (444 passed)
• bunx tsc -p packages/adapter-slack/tsconfig.json --noEmit
• bunx biome check on changed files

Checklist

• All commits are signed and verified
• All commits are signed off for the DCO (git commit -s)
• pnpm validate passes (targeted package validation run)
• Changeset added
• Documentation updated (N/A; automatic enforcement of Slack platform limits)

[vercel]

@dcbuild3r is attempting to deploy a commit to the Vercel Team on Vercel.

A member of the Team first needs to authorize it.

[vercel]

Suggested change

	constlastCode=value.charCodeAt(end-1);
	if(lastCode>=0xd800&&lastCode<=0xdbff){
	end-=1;
	// Only guard against splitting a surrogate pair when there is a following
	// code unit that would be separated. If `end` is already at the end of the
	// string, or decrementing would leave an empty segment, keep `end` as-is so
	// that `offset` always advances and the loop terminates.
	if(end<value.length&&end-1>offset){
	constlastCode=value.charCodeAt(end-1);
	if(lastCode>=0xd800&&lastCode<=0xdbff){
	end-=1;
	}

splitStreamChunkField enters an infinite loop when the input string ends with an unpaired high surrogate at the final chunk boundary, hanging the synchronous stream handler and blocking the Node event loop.

[dcbuild3r]

Summary

Slack limits structured task and plan fields to 256 characters. Truncate IDs, titles, and plan titles safely, and split oversized task details/output into stable continuation chunks so large tool results do not make native streaming fail. Preserve the prior part count on subsequent task updates so existing continuation cards can be updated consistently.

Test plan

• bunx vitest run packages/adapter-slack/src/index.test.ts (444 passed)
• bunx tsc -p packages/adapter-slack/tsconfig.json --noEmit
• bunx biome check on changed files

Checklist

• All commits are signed and verified
• All commits are signed off for the DCO (git commit -s)
• pnpm validate passes (targeted package validation run)
• Changeset added
• Documentation updated (N/A; automatic enforcement of Slack platform limits)

[vercel]

@dcbuild3r is attempting to deploy a commit to the Vercel Team on Vercel.

A member of the Team first needs to authorize it.

[vercel]

Suggested change

	constlastCode=value.charCodeAt(end-1);
	if(lastCode>=0xd800&&lastCode<=0xdbff){
	end-=1;
	// Only guard against splitting a surrogate pair when there is a following
	// code unit that would be separated. If `end` is already at the end of the
	// string, or decrementing would leave an empty segment, keep `end` as-is so
	// that `offset` always advances and the loop terminates.
	if(end<value.length&&end-1>offset){
	constlastCode=value.charCodeAt(end-1);
	if(lastCode>=0xd800&&lastCode<=0xdbff){
	end-=1;
	}

splitStreamChunkField enters an infinite loop when the input string ends with an unpaired high surrogate at the final chunk boundary, hanging the synchronous stream handler and blocking the Node event loop.

[dcbuild3r]

Summary

Slack limits structured task and plan fields to 256 characters. Truncate IDs, titles, and plan titles safely, and split oversized task details/output into stable continuation chunks so large tool results do not make native streaming fail. Preserve the prior part count on subsequent task updates so existing continuation cards can be updated consistently.

Test plan

• bunx vitest run packages/adapter-slack/src/index.test.ts (444 passed)
• bunx tsc -p packages/adapter-slack/tsconfig.json --noEmit
• bunx biome check on changed files

Checklist

• All commits are signed and verified
• All commits are signed off for the DCO (git commit -s)
• pnpm validate passes (targeted package validation run)
• Changeset added
• Documentation updated (N/A; automatic enforcement of Slack platform limits)

[vercel]

@dcbuild3r is attempting to deploy a commit to the Vercel Team on Vercel.

A member of the Team first needs to authorize it.

[vercel]

Suggested change

	constlastCode=value.charCodeAt(end-1);
	if(lastCode>=0xd800&&lastCode<=0xdbff){
	end-=1;
	// Only guard against splitting a surrogate pair when there is a following
	// code unit that would be separated. If `end` is already at the end of the
	// string, or decrementing would leave an empty segment, keep `end` as-is so
	// that `offset` always advances and the loop terminates.
	if(end<value.length&&end-1>offset){
	constlastCode=value.charCodeAt(end-1);
	if(lastCode>=0xd800&&lastCode<=0xdbff){
	end-=1;
	}

splitStreamChunkField enters an infinite loop when the input string ends with an unpaired high surrogate at the final chunk boundary, hanging the synchronous stream handler and blocking the Node event loop.

[dcbuild3r]

Summary

Slack limits structured task and plan fields to 256 characters. Truncate IDs, titles, and plan titles safely, and split oversized task details/output into stable continuation chunks so large tool results do not make native streaming fail. Preserve the prior part count on subsequent task updates so existing continuation cards can be updated consistently.

Test plan

• bunx vitest run packages/adapter-slack/src/index.test.ts (444 passed)
• bunx tsc -p packages/adapter-slack/tsconfig.json --noEmit
• bunx biome check on changed files

Checklist

• All commits are signed and verified
• All commits are signed off for the DCO (git commit -s)
• pnpm validate passes (targeted package validation run)
• Changeset added
• Documentation updated (N/A; automatic enforcement of Slack platform limits)

[vercel]

@dcbuild3r is attempting to deploy a commit to the Vercel Team on Vercel.

A member of the Team first needs to authorize it.

[vercel]

Suggested change

	constlastCode=value.charCodeAt(end-1);
	if(lastCode>=0xd800&&lastCode<=0xdbff){
	end-=1;
	// Only guard against splitting a surrogate pair when there is a following
	// code unit that would be separated. If `end` is already at the end of the
	// string, or decrementing would leave an empty segment, keep `end` as-is so
	// that `offset` always advances and the loop terminates.
	if(end<value.length&&end-1>offset){
	constlastCode=value.charCodeAt(end-1);
	if(lastCode>=0xd800&&lastCode<=0xdbff){
	end-=1;
	}

splitStreamChunkField enters an infinite loop when the input string ends with an unpaired high surrogate at the final chunk boundary, hanging the synchronous stream handler and blocking the Node event loop.