deepseek-ai/deepseek-harness · error

conversation Context ${context.key} received an update befor

Error message

conversation Context ${context.key} received an update before its start Match

What it means

Error "conversation Context ${context.key} received an update before its start Match" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/client/runtime/src/client/sessions/conversation-assembler.ts:502

            }
            discoveredStart = entry.match
          }
          const owners = this.contextsBySeq.get(entry.match.event.seq) ?? new Set<InternalContext>()
          owners.add(context)
          this.contextsBySeq.set(entry.match.event.seq, owners)
          return entry.match
        })
        .sort((left, right) => left.event.seq - right.event.seq)
      context.matches = mergeMatches(context.key, additions, context.matches)
      if (discoveredStart !== undefined) {
        context.start = discoveredStart
        context.startSeq = discoveredStart.event.seq
        const starts = startsByKind.get(context.kind) ?? []
        starts.push(context)
        startsByKind.set(context.kind, starts)
      }
      if (context.start !== undefined && context.matches[0] !== context.start) {
        throw new Error(`conversation Context ${context.key} received an update before its start Match`)
      }
      affected.add(context)
      this.dirty.add(context)
    }
    for (const [kind, contexts] of startsByKind) this.indexStartedContexts(kind, contexts)
  }

  private replayContexts(contexts: ReadonlySet<InternalContext>): void {
    const ordered = [...contexts].sort((left, right) =>
      (left.startSeq ?? Number.POSITIVE_INFINITY) - (right.startSeq ?? Number.POSITIVE_INFINITY))
    for (const context of ordered) {
      if (context.start === undefined) {
        context.state = undefined
        this.dirty.add(context)
        continue
      }
      this.replayContext(context)
    }

View on GitHub (pinned to b150a551b8)

Solutions

1. Deliver the start Match before any update for the Context.

When it happens

Trigger: Thrown at packages/client/runtime/src/client/sessions/conversation-assembler.ts:502 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of deepseek-ai/deepseek-harness@b150a551b8 (2026-08-24). Data as JSON: /api/errors/f679867d1d05556d. Report an issue: GitHub.