feat(#137): create Forced Continuation Prompt System

Implement prompt generation system that produces continuation prompts
based on verification failures to force AI agents to complete work.

Service:
- generatePrompt: Complete prompt from failure context
- generateTestFailurePrompt: Test-specific guidance
- generateBuildErrorPrompt: Build error resolution
- generateCoveragePrompt: Coverage improvement strategy
- generateIncompleteWorkPrompt: Completion requirements

Templates:
- base.template: System/user prompt structure
- test-failure.template: Test fix guidance
- build-error.template: Compilation error guidance
- coverage.template: Coverage improvement strategy
- incomplete-work.template: Completion requirements

Constraint escalation:
- Attempt 1: Normal guidance
- Attempt 2: Focus only on failures
- Attempt 3: Minimal changes only
- Final: Last attempt warning

Priority levels: critical/high/normal based on failure severity

Tests: 24 passing with 95.31% coverage

Fixes #137

Co-Authored-By: Claude Opus 4.5 <[email protected]>

apps/api/src/continuation-prompts/templates/base.template.ts

@@ -0,0 +1,18 @@
+export const BASE_CONTINUATION_SYSTEM = `You are continuing work on a task that was not completed successfully.
+Your previous attempt did not pass quality gates. You MUST fix the issues below.
+
+CRITICAL RULES:
+1. You MUST address EVERY failure listed
+2. Do NOT defer work to future tasks
+3. Do NOT claim done until all gates pass
+4. Run tests before claiming completion
+`;
+
+export const BASE_USER_PROMPT = `Task: {{taskDescription}}
+
+Previous attempt {{attemptNumber}} of {{maxAttempts}} did not pass quality gates.
+
+{{failures}}
+
+{{constraints}}
+`;

apps/api/src/continuation-prompts/templates/build-error.template.ts

@@ -0,0 +1,10 @@
+export const BUILD_ERROR_TEMPLATE = `Build errors detected:
+{{errors}}
+
+Fix these TypeScript/compilation errors. Do not proceed until build passes.
+
+Steps:
+1. Read the error messages carefully
+2. Fix type mismatches, missing imports, or syntax errors
+3. Run build to verify it passes
+`;

apps/api/src/continuation-prompts/templates/coverage.template.ts

@@ -0,0 +1,15 @@
+export const COVERAGE_TEMPLATE = `Test coverage is below required threshold.
+
+Current coverage: {{currentCoverage}}%
+Required coverage: {{requiredCoverage}}%
+Gap: {{gap}}%
+
+Files with insufficient coverage:
+{{uncoveredFiles}}
+
+Steps to improve coverage:
+1. Identify uncovered code paths
+2. Write tests for uncovered scenarios
+3. Focus on edge cases and error handling
+4. Run coverage report to verify improvement
+`;

apps/api/src/continuation-prompts/templates/incomplete-work.template.ts

@@ -0,0 +1,13 @@
+export const INCOMPLETE_WORK_TEMPLATE = `The task implementation is incomplete.
+
+Issues detected:
+{{issues}}
+
+You MUST complete ALL aspects of the task. Do not leave TODO comments or deferred work.
+
+Steps:
+1. Review each incomplete item
+2. Implement the missing functionality
+3. Write tests for the new code
+4. Verify all requirements are met
+`;

apps/api/src/continuation-prompts/templates/index.ts

@@ -0,0 +1,5 @@
+export * from "./base.template";
+export * from "./test-failure.template";
+export * from "./build-error.template";
+export * from "./coverage.template";
+export * from "./incomplete-work.template";

apps/api/src/continuation-prompts/templates/test-failure.template.ts

@@ -0,0 +1,9 @@
+export const TEST_FAILURE_TEMPLATE = `The following tests are failing:
+{{failures}}
+
+For each failing test:
+1. Read the test to understand what is expected
+2. Fix the implementation to pass the test
+3. Run the test to verify it passes
+4. Do NOT skip or modify tests - fix the implementation
+`;