plandex-ai/plandex · error

failed to build plan: %v

Error message

failed to build plan: %v

What it means

After a context update produced conflicts, the CLI starts an inline plan build via buildPlanInlineFn and wraps any build failure as 'failed to build plan: %v'. It surfaces that the regeneration of the plan (after conflict resolution) did not complete.

Source

Thrown at app/cli/lib/context_update.go:1013

		}
		newTotal := totalTokens + tokensDiff
		outdatedRes.Msg = shared.SummaryForUpdateContext(shared.SummaryForUpdateContextParams{
			NumFiles:    numFiles,
			NumTrees:    numTrees,
			NumUrls:     numUrls,
			NumMaps:     numMaps,
			TokensDiff:  tokensDiff,
			TotalTokens: newTotal,
		})
	}

	if hasConflicts {
		term.StartSpinner("🏗️  Starting build...")
		_, err := buildPlanInlineFn(false, nil)
		term.StopSpinner()
		fmt.Println()
		if err != nil {
			return nil, fmt.Errorf("failed to build plan: %v", err)
		}
	}

	// Warn about any items skipped
	if len(filesSkippedTooLarge) > 0 || len(filesSkippedAfterSizeLimit) > 0 ||
		len(mapFilesTruncatedTooLarge) > 0 || len(mapFilesSkippedAfterSizeLimit) > 0 {
		printSkippedFilesMsg(filesSkippedTooLarge, filesSkippedAfterSizeLimit,
			mapFilesTruncatedTooLarge, mapFilesSkippedAfterSizeLimit)
	}

	return &outdatedRes, nil
}

func tableForContextOutdated(updatedContexts []*shared.Context, tokenDiffsById map[string]int) string {
	if len(updatedContexts) == 0 {
		return ""
	}

View on GitHub (pinned to e2d772072e)

Solutions

1. Read the wrapped build error for the actual build failure
2. Fix the conflicting/outdated files flagged in the context update, then rebuild
3. Run the plan build manually to see full build output
4. Reset the plan context to a known-good state and re-apply updates

Example fix

// before: silent failure inside larger flow
if err != nil {
    return nil, fmt.Errorf("failed to build plan: %v", err)
}
// after: guide user to rebuild
if err != nil {
    return nil, fmt.Errorf("failed to build plan: %v — resolve conflicts and run the build again", err)
}

if !hasConflicts {
    return nil // no build needed
}

res, err := CheckOutdatedContext(...)
if err != nil && strings.Contains(err.Error(), "failed to build plan") {
    fmt.Fprintf(os.Stderr, "plan rebuild failed, resolve conflicts and rebuild manually: %v\n", err)
    return nil
}

When it happens

Trigger: hasConflicts is true after UpdateContext and the subsequent buildPlanInlineFn(false, nil) call returns an error — e.g. compile/analysis failure while rebuilding the plan from the merged context.

Common situations: Merge conflicts in updated context were auto-resolved but the resulting plan cannot build; source changes since last build broke the plan; LLM/codegen failure during inline rebuild; interrupted spinner session leaving partial state.

Related errors

• failed to build plan: %v
• no current plan
• no current plan
• error selecting account: account not found
• error signing in: %v

AI-assisted analysis of plandex-ai/plandex@e2d772072e (2026-09-05). Data as JSON: /api/errors/0b4b713b5a5dd1c1. Report an issue: GitHub.