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Add Language Server Protocol integration modeled on opencode's, wired for
this codebase's plain-TypeScript tool/agent architecture.
Core (@dispatch/core):
- lsp/client.ts: LSP/JSON-RPC client over stdio (vscode-jsonrpc) with the
initialize handshake, didOpen/didChange sync, push + pull diagnostics
(textDocument/diagnostic, workspace/diagnostic), and a generic request()
passthrough for hover/definition/references/documentSymbol.
- lsp/server.ts: resolves dispatch.toml [lsp] entries into spawn specs.
Config-driven only — no builtin registry, no auto-download.
- lsp/manager.ts: process-wide LspManager owning client lifecycles, keyed
by root+serverID, lazy spawn + reuse + graceful shutdown.
- lsp/language.ts: extension->languageId map incl. .luau -> "luau".
- lsp/diagnostic.ts: error-only <diagnostics> block formatting (1-based).
- tools/lsp.ts: on-demand 'lsp' tool (1-based coords -> 0-based wire).
- write-file.ts: optional onAfterWrite hook for diagnostics-on-write.
- config schema: validate [lsp] block; DispatchConfig.lsp + LspServerConfig.
API (@dispatch/api):
- AgentManager owns one LspManager; per-working-directory server cache
cleared on config reload; diagnostics appended to write_file results;
'lsp' tool gated by new perm_lsp setting; shutdownAll on destroy().
Config:
- dispatch.toml: documented, commented [lsp.luau-lsp] Roblox example.
Tests: fake-lsp-server fixture + client/manager/server/diagnostic/schema/
tool/write-hook suites, plus an opt-in real-binary luau-lsp smoke test
(auto-skipped when luau-lsp is absent). 652 pass; biome + 3 typechecks green.
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reasoning round-trip + max-thinking budget audit
Migrates the LLM stack from [email protected] + @ai-sdk/[email protected] +
@ai-sdk/[email protected] to [email protected] + @ai-sdk/[email protected]
+ @ai-sdk/[email protected]. Full design in plan-v6-upgrade.md;
two rounds of Gemini code review captured in report.md.
Motivation: the recurring 'reasoning-signature without reasoning' error
on Claude Opus 4.7 was a v4 SDK artefact — @ai-sdk/[email protected] emitted
Anthropic signature_delta as a separate stream chunk that orphaned when
the model produced a signed-but-empty thinking block, and our chunk
store had no signature field so the round-trip back to Anthropic was
rejected on the next turn. In v6, signatures arrive inside
providerMetadata on the reasoning-end event, and the orphan-signature
class of bug is gone at the SDK level.
Core changes:
• ThinkingChunk gains optional metadata?: Record<string, unknown>
(the v6 providerMetadata blob). A non-undefined metadata 'seals'
the chunk: subsequent reasoning-delta opens a new chunk rather
than extending the sealed one.
• AgentEvent gains { type: 'reasoning-end'; metadata? } (replaces
the v4 reasoning-signature variant).
• toModelMessages (replaces toCoreMessages):
- returns ModelMessage[] (was CoreMessage[])
- thinking → { type: 'reasoning', text, providerOptions: metadata }
- tool-batch entries → { type: 'tool-call', input } (was 'args')
- tool results → { output: { type: 'text', value } } ToolResultOutput
• Claude OAuth uses createAnthropic({ authToken }) natively — no more
custom-fetch x-api-key → Bearer swap.
• rewriteBodyForOpus47 deleted — Opus 4.7 adaptive thinking is native
via providerOptions.anthropic.thinking = { type: 'adaptive' }.
• V1 middleware → V3 (specificationVersion: 'v3').
• v4-era normalizeMessages openai-compatible middleware deleted; the
v6 openai-compatible provider extracts reasoning_content natively
from { type: 'reasoning' } content parts.
• applyAnthropicStructuralNormalisations (mirrors opencode
provider/transform.ts:53-148): drops empty text/reasoning parts,
scrubs non-[a-zA-Z0-9_-] toolCallIds, splits [tool-call, non-tool]
assistant turns (Anthropic rejects tool_use followed by text).
• applyOpenAICompatibleReasoningNormalisation (mirrors opencode
transform.ts:217-249): lifts reasoning text into
providerOptions.openaiCompatible.reasoning_content (always, even
empty). Solves DeepSeek 'The reasoning_content in the thinking
mode must be passed back' — the v6 SDK skips emitting
reasoning_content when text is empty (dist/index.mjs:245), but
DeepSeek requires the field present once thinking was used.
• Tools: tool({ inputSchema: jsonSchema(zodToJsonSchema(...)) })
(was parameters: ZodSchema). AI SDK tools have no execute
callback — the agent runs tools manually for permission prompts
and shell-output streaming. New dep: zod-to-json-schema@^3.25.2.
• fullStream event loop rewritten for v6 event shape: text-delta
(text not textDelta), reasoning-start/delta/end, tool-input-*,
tool-call (input not args), tool-result, tool-error (new), abort
(new), start-step/finish-step, finish.
Max-thinking audit (matches opencode transform.ts:642-671 budgets):
• Claude enabled-thinking max budget 16000 → 31999 (Anthropic ceiling)
• Claude enabled-thinking high budget 10000 → 16000
• maxOutputTokens 'budget + 8000' → fixed 32000 (matches opencode's
OUTPUT_TOKEN_MAX; model self-allocates thinking vs response within)
• Opus 4.7 adaptive thinking gains display: 'summarized' and sibling
effort field (without these, thinking content is hidden by Anthropic
and the model barely thinks).
Frontend mirrors:
• types.ts — ThinkingChunk.metadata?, AgentEvent reasoning-end
• tabs.svelte.ts — routes reasoning-end through applyChunkEvent
• ChatMessage.svelte — hides empty thinking chunks; hides the entire
assistant bubble when no chunk has renderable content
Gemini-review-driven fixes:
• tool-error and abort stream events now surface as error chunks
(were silently ignored)
• toolCallId scrubbing pass (opencode transform.ts:96-122 parity)
• Empty-reasoning-cull explicit test coverage for both Anthropic
structural normalisation and DeepSeek path
Test counts (223 tests across 3 packages, all green):
• tests/chunks/append.test.ts: 44 (was 38) — reasoning-end sealing,
orphan walk-back, multi-block interleaving
• tests/agent/agent.test.ts: 24 (was 5) — exhaustive v6 event
mappings, structural normalisations, signature/reasoning_content
round-trip, tool-error/abort branches, DeepSeek scenario, empty
reasoning edge case
• tests/llm/provider.test.ts: 9 (was 22) — dropped 13 obsolete v4
middleware tests; new minimal tests confirm no middleware wrapping
on default openai-compat path and that createAnthropic gets
authToken vs apiKey correctly for OAuth vs api-key flows
• tests/tools/registry.test.ts: 10 (was 4) — v6 tool() contract
(inputSchema, no execute, JSON Schema for nested zod)
• packages/api/tests/agent-manager.test.ts: 12 (was 7) — mock Agent
emits v6 reasoning events; reasoning-end broadcast + ordering
• packages/frontend/tests/chat-store.test.ts: 35 (was 32) —
reasoning-end flow through Svelte $state store
typecheck clean (tsc --noEmit on core + api, svelte-check on frontend),
biome clean across 124 files.
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SDK compat
- Implement Anthropic prompt caching: first system message + last 2 non-system messages get cache_control: ephemeral, mirroring OpenCode's applyCaching strategy. Move system prompt inline into messages array so providerOptions can attach.
- Add opencode-anthropic provider variant routing MiniMax/Qwen models through the /messages endpoint with x-api-key auth, distinct from the Claude OAuth flow's Bearer auth and Claude Code mimicry.
- Split isAnthropic into isClaudeOAuth (billing header, mcp_ tool prefix, thinking config) and usesAnthropicSDK (cache markers) so non-OAuth Anthropic-format gateways get the right treatment.
- Pin @ai-sdk/anthropic to ^1.2.12: v3 returns LanguageModelV3-spec models that ai v4's streamText rejects at runtime ('AI SDK 4 only supports models that implement specification version v1'). Drop unnecessary V1 casts.
- Restore Opus 4.7 extended thinking by rewriting the outgoing /messages body in the Claude OAuth fetch interceptor: inject thinking: { type: 'adaptive' } (v1 SDK can't emit it), strip temperature/top_p/top_k (Anthropic rejects them with thinking enabled). Gated on max_tokens > 4096 so effort=none still works.
- Bump MAX_STEPS from 10 to 50 to align with AI SDK's stepCountIs(20) default and reduce mid-task halts.
- Fix pre-existing typecheck errors in agent-manager.ts (entry/nextEntry narrowing), app.ts (agentModels body field), KeyUsage.svelte (m guards), and a TS2742 in provider.ts via explicit ModelFactory return type.
- buildFallbackSequence now always returns at least one entry so processMessage runs the agent loop even without keyId/modelId (fixes 4 broken agent-manager tests).
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filter
- Added Google (Gemini) as a provider: add-key UI, env var resolution via resolveApiKey, usage tracking via native models endpoint + gemini.google.com cookie scraping
- @ai-sdk/anthropic upgraded to v3 (adaptive thinking support) with LanguageModelV1 cast for ai v4 compat
- Claude Opus 4.7 uses adaptive thinking (type: adaptive); all other models keep explicit budget tokens
- Model selector modal: search filter with space matching dash/underscore
- Copy button: all tool results truncated at 300 chars
- Sidebar layout fix: Claude Reset panel removed from flex-1 fill to prevent overlap
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effort, and dynamic model listing
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- Config system: TOML-based dispatch.toml with hot-reload via chokidar
- Model/key resolution: tag-based model selection, key fallback chains
- Skills system: directory loader with TOML frontmatter, agent mappings
- Task list tool: add/update/list/get operations with WebSocket events
- API routes: GET /config, /skills, /skills/:name, /models, /models/resolve
- Frontend: sidebar with model status, task list, config viewer, skills browser, permission log
- Sliding sidebar animation using CSS transitions (not Svelte transitions)
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Permission engine:
- Rule-based engine: wildcard matching, last-match-wins, reject cascade
- PermissionService with pending/approved state, PermissionChecker interface
- dispatch.yaml config loader with per-permission pattern rules
Shell tool:
- run_shell tool with child_process spawn, timeout, streaming output
- Tree-sitter static analysis (web-tree-sitter + tree-sitter-bash WASM)
- BashArity command normalization for 'always allow' patterns
- FILE_COMMANDS set: rm, cp, mv, mkdir, ls, find, grep, cat, etc.
Agent loop refactored:
- Removed maxSteps, manual step loop with tool execution
- Permission checks on shell commands (external_directory only)
- Permission checks on file tools outside workspace boundary
- Symlink bypass fix (realpathSync), .. false positive fix
- Shell output streaming via Promise.race + setImmediate polling
API layer:
- PermissionManager wraps PermissionService, broadcasts via WebSocket
- WebSocket handles permission-reply messages from frontend
- Config loaded from dispatch.yaml, converted to ruleset
Frontend:
- Permission prompt modal (native dialog, focus trap, ARIA)
- Always-allow confirmation flow with pattern preview
- Shell output display (live streaming + final parsed result)
- Permission log panel (fixed bottom-right overlay)
- Exit code badge (green 0, red non-zero)
134 tests, typecheck clean on all 3 packages
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- Bun monorepo with @dispatch/core, @dispatch/api, @dispatch/frontend
- Agent runtime with Vercel AI SDK, streaming via WebSocket
- Tools: read_file, write_file, list_files (scoped to working directory)
- Hono API server with POST /chat, GET /status, GET /health, WS /ws
- Svelte 5 + DaisyUI frontend with chat UI, theme switcher, copy button
- OpenCode Go (Zen) as LLM provider, deepseek-v4-flash-free model
- Docker setup (dev + prod) with bin/ scripts and gopass secrets
- Biome v2 linting/formatting, Vitest tests (44 passing)
- Debug info attached to error messages for diagnostics
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