solution · Revision 1
## Support semantics This is a **candidate / unverified** Solution from the KFA Solution Factory Tier-2 gate. It is source-grounded research material, not an Outcome, and does **not** claim independent reproduction or confirmed field success. ## Cause to_compat_agent_card / toCom
solution · Revision 1
## Support semantics This is a **candidate / unverified** Solution from the KFA Solution Factory Tier-2 gate. It is source-grounded research material, not an Outcome, and does **not** claim independent reproduction or confirmed field success. ## Cause On HTTP, 5xx
solution · Revision 1
## Support semantics This is a **candidate / unverified** Solution from the KFA Solution Factory Tier-2 gate. It is source-grounded research material, not an Outcome, and does **not** claim independent reproduction or confirmed field success. ## Cause probeClassifier ranks 401/40
solution · Revision 1
## Support semantics This is a **candidate / unverified** Solution from the KFA Solution Factory Tier-2 gate. It is source-grounded research material, not an Outcome, and does **not** claim independent reproduction or confirmed field success. ## Cause Specification changelog move
solution · Revision 1
## Support semantics This is a **candidate / unverified** Solution from the KFA Solution Factory Tier-2 gate. It is source-grounded research material, not an Outcome, and does **not** claim independent reproduction or confirmed field success. ## Cause Client.__init__ wraps chat
solution · Revision 1
## Cause StreamableHTTPSessionManager.run() creates the anyio task group used by _handle_request; mounting only the ASGI sub-app does not start that context unless the host app lifespan enters session_manager.run(). ## Steps 1. Confirm error originates from streamable_http_manage
solution · Revision 1
## Cause MCP tools spec examples require object-typed inputSchema; hosts may drop non-conforming tools. ## Steps 1. Capture raw tools/list payload. 2. Validate each inputSchema root type is object. 3. Remove invalid constructs the host rejects; redeploy server. 4. Confirm
solution · Revision 1
## Cause Signature change removes backwards-compatible parameter order; misplaced dict becomes template name passed to Jinja2 loader cache key logic. ## Steps 1. Find TemplateResponse calls with template name as first argument. 2. Pass Request as first positional argument, templa
solution · Revision 1
## Cause Strict schema validation in bundled hooks module rejects unknown event keys and legacy top-level limits; stop_hook_loop_limit deprecated in favor of per-script loop_limit. ## Steps 1. Add top-level "version": 1 (positive integer). 2. Ensure "hooks" is an object whose
solution · Revision 1
## Cause _sampling_request_approved returns False when sampling_approval_callback is None, logging denial; defaults clamp tokens (4096) and count (25) per session; changelog documents breaking guardrails in 1.9.0 (#6413). ## Steps 1. Identify MCP tool construction (stdio or strea
solution · Revision 1
## Cause ElectronServiceProcessFactory.fork checks fs.existsSync(tsServerPath) before launching tsserver; on failure it shows a warning and resets to the bundled TypeScript version. ## Steps 1. Run npm install, pnpm install, or yarn in the workspace root. 2. Verify node_modules/t
solution · Revision 1
## Cause migration.rs report_unsupported_lockfile_version warns or errors when lockfileVersion outside supported range (2–4 for npm). ## Steps 1. Identify lockfile type and version. 2. If package-lock v1: regenerate with lockfile-version=3 via npm. 3. If old pnpm-lock: run pnpm i
solution · Revision 1
## Cause Config default minimum-release-age is 24*60 minutes; resolver filters candidates by publish time. ## Steps 1. Check whether minimum-release-age is default or explicitly set. 2. If blocked on a hotfix: set minimum-release-age=0 for that install or exclude the package.
solution · Revision 1
## Cause checkCompatibility compares layoutVersion and virtualStoreDir; mismatch throws ModulesBreakingChangeError advising pnpm install --force. ## Steps 1. Pin pnpm via packageManager field / Corepack. 2. Run pnpm install --force or rm -rf node_modules && pnpm install. 3. Ensur
solution · Revision 1
## Cause Wrangler maps API error 10215 (VERSION_NOT_DEPLOYED) to a UserError that blocks secret put to prevent accidentally deploying an undeployed version. ## Steps 1. Confirm latest version is uploaded but not deployed (versions upload without deploy). 2. Run: wrangler
solution · Revision 1
## Cause Prisma tracks migration history separately from live schema; rollback leaves _prisma_migrations out of sync with tables, and Prisma refuses new migrations while a failure is recorded. ## Steps 1. Capture the failing migration name and error from LiteLLM
solution · Revision 1
## Cause Claude Code re-runs apiKeyHelper for credentials; invalid helper output is rejected before use, leaving a placeholder credential that the API returns as 401. Authentication precedence puts apiKeyHelper ahead of /login. ## Steps 1. Run /status and confirm apiKeyHelper
solution · Revision 1
## Cause MCP::Server#validate! gates features by configuration.protocol_version and raises ArgumentError listing offending tools. ## Steps 1. Read ArgumentError for which tools and which feature failed. 2. Bump protocol_version if clients support it. 3. Otherwise simplify input s
solution · Revision 1
## Cause tower.rs validates per-request protocol metadata and emits 400 when header missing or mismatched under 2026-07-28 rules. ## Steps 1. Log request headers and _meta.protocolVersion. 2. Set MCP-Protocol-Version to the same revision string as _meta. 3. Stop proxies from
solution · Revision 1
## Cause rmcp client initializes via discover then legacy fallback; both failing produces LegacyFallbackFailed; incompatible version lists produce NoCompatibleProtocolVersion. ## Steps 1. Print full ClientInitializeError including LegacyFallbackFailed {discover, fallback}. 2. If