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* Content Filter Guardrail\n *\n * Detects harmful content categories (AWS Bedrock pattern).\n */\n\nimport type {\n Guardrail,\n GuardrailResult,\n GuardrailContext,\n} from '../core/types';\n\nexport interface ContentFilterConfig {\n /** Categories to filter */\n categories?: ContentCategory[];\n /** Custom blocked patterns (regex strings) */\n blockedPatterns?: string[];\n /** Threshold for detection (0-1, default 0.5) */\n threshold?: number;\n /** Whether to trigger tripwire on detection */\n tripwire?: boolean;\n}\n\nexport type ContentCategory =\n | 'hate'\n | 'violence'\n | 'sexual'\n | 'self_harm'\n | 'dangerous'\n | 'illegal';\n\nconst DEFAULT_CATEGORIES: ContentCategory[] = [\n 'hate',\n 'violence',\n 'sexual',\n 'self_harm',\n 'dangerous',\n 'illegal',\n];\n\n// Pattern-based detection (lightweight, runs on-device)\nconst CATEGORY_PATTERNS: Record = {\n hate: [\n /\\b(hate\\s+(?:speech|crime))\\b/i,\n /\\b(racial\\s+slur|ethnic\\s+cleansing)\\b/i,\n ],\n violence: [\n /\\b(how\\s+to\\s+(?:kill|murder|assassinate|bomb|poison))\\b/i,\n /\\b(mass\\s+(?:shooting|murder|casualty))\\b/i,\n ],\n sexual: [/\\b(explicit\\s+(?:sexual|pornographic))\\b/i],\n self_harm: [\n /\\b(how\\s+to\\s+(?:commit\\s+suicide|self[\\s-]harm|hurt\\s+(?:myself|yourself)))\\b/i,\n ],\n dangerous: [\n /\\b(how\\s+to\\s+(?:make|build|create)\\s+(?:a\\s+)?(?:bomb|explosive|weapon|poison))\\b/i,\n ],\n illegal: [/\\b(how\\s+to\\s+(?:hack|steal|forge|counterfeit|launder))\\b/i],\n};\n\n/**\n * Create a content filter guardrail.\n */\nexport function createContentFilterGuardrail(\n config?: ContentFilterConfig\n): Guardrail {\n const categories = config?.categories ?? 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DEFAULT_TYPES;\n const redact = config?.redact ?? true;\n const placeholder = config?.placeholder ?? '[REDACTED]';\n const tripwire = config?.tripwire ?? false;\n\n return {\n name: 'pii_detection',\n tripwire,\n validate: async (\n input: unknown,\n _ctx: GuardrailContext\n ): Promise => {\n const text = String(input);\n const detections: Array<{ type: PIIType; match: string }> = [];\n\n for (const type of types) {\n const pattern = PII_PATTERNS[type];\n // Reset regex state\n pattern.lastIndex = 0;\n let match: RegExpExecArray | null;\n while ((match = pattern.exec(text)) !== null) {\n detections.push({ type, match: match[0] });\n }\n }\n\n if (detections.length === 0) {\n return { passed: true };\n }\n\n // Redact if configured\n let replacement: string | undefined;\n if (redact) {\n let redacted = text;\n for (const type of types) {\n const pattern = PII_PATTERNS[type];\n pattern.lastIndex = 0;\n redacted = redacted.replace(pattern, placeholder);\n }\n replacement = redacted;\n }\n\n return {\n passed: false,\n tripwireTriggered: tripwire,\n info: {\n detections: detections.map((d) => ({\n type: d.type,\n matchLength: d.match.length,\n })),\n detectionCount: detections.length,\n },\n replacement: redact ? replacement : undefined,\n };\n },\n };\n}\n","/**\n * Topic Control Guardrail\n *\n * Blocks forbidden topics and enforces on-topic responses.\n * AWS Bedrock pattern.\n */\n\nimport type {\n Guardrail,\n GuardrailResult,\n GuardrailContext,\n} from '../core/types';\n\nexport interface TopicConfig {\n /** Forbidden topics (will block if detected) */\n forbiddenTopics?: string[];\n /** Allowed topics (will block if NOT detected — use for narrow scoping) */\n allowedTopics?: string[];\n /** Custom topic detection patterns */\n patterns?: Record;\n /** Whether to trigger tripwire */\n tripwire?: boolean;\n}\n\n/**\n * Create a topic control guardrail.\n */\nexport function createTopicGuardrail(config: TopicConfig): Guardrail {\n const tripwire = config.tripwire ?? false;\n\n return {\n name: 'topic_control',\n tripwire,\n validate: async (\n input: unknown,\n _ctx: GuardrailContext\n ): Promise => {\n const text = String(input).toLowerCase();\n\n // Check forbidden topics\n if (config.forbiddenTopics) {\n for (const topic of config.forbiddenTopics) {\n const topicLower = topic.toLowerCase();\n if (text.includes(topicLower)) {\n // Check custom patterns if available\n const patterns = config.patterns?.[topic];\n if (patterns) {\n for (const pattern of patterns) {\n if (pattern.test(text)) {\n return {\n passed: false,\n tripwireTriggered: tripwire,\n info: { forbiddenTopic: topic, matched: true },\n };\n }\n }\n } else {\n return {\n passed: false,\n tripwireTriggered: tripwire,\n info: { forbiddenTopic: topic, matched: true },\n };\n }\n }\n }\n }\n\n // Check allowed topics (if specified, must match at least one)\n if (config.allowedTopics && config.allowedTopics.length > 0) {\n const matchesAny = config.allowedTopics.some((topic) => {\n const topicLower = topic.toLowerCase();\n if (text.includes(topicLower)) return true;\n const patterns = config.patterns?.[topic];\n if (patterns) {\n return patterns.some((p) => p.test(text));\n }\n return false;\n });\n\n if (!matchesAny) {\n return {\n passed: false,\n tripwireTriggered: tripwire,\n info: {\n allowedTopics: config.allowedTopics,\n matched: false,\n },\n };\n }\n }\n\n return { passed: true };\n },\n };\n}\n","/**\n * Token Budget Guardrail\n *\n * Enforces spending limits on agent inference calls.\n * Wraps existing edgework TokenBudgetManager.\n */\n\nimport type {\n Guardrail,\n GuardrailResult,\n GuardrailContext,\n} from '../core/types';\n\nexport interface TokenBudgetGuardrailConfig {\n /** Max tokens per request */\n maxTokensPerRequest?: number;\n /** Max tokens per session */\n maxTokensPerSession?: number;\n /** Max cost per session (in abstract units) */\n maxCostPerSession?: number;\n /** Whether to trigger tripwire when budget exceeded */\n tripwire?: boolean;\n}\n\ninterface BudgetState {\n tokensUsed: number;\n costUsed: number;\n requestCount: number;\n}\n\n/**\n * Create a token budget guardrail.\n */\nexport function createTokenBudgetGuardrail(\n config: TokenBudgetGuardrailConfig\n): Guardrail & { getUsage: () => BudgetState; reset: () => void } {\n const state: BudgetState = {\n tokensUsed: 0,\n costUsed: 0,\n requestCount: 0,\n };\n\n const tripwire = config.tripwire ?? false;\n\n const guardrail: Guardrail & {\n getUsage: () => BudgetState;\n reset: () => void;\n } = {\n name: 'token_budget',\n tripwire,\n validate: async (\n _input: unknown,\n _ctx: GuardrailContext\n ): Promise => {\n // Check session token limit\n if (\n config.maxTokensPerSession &&\n state.tokensUsed >= config.maxTokensPerSession\n ) {\n return {\n passed: false,\n tripwireTriggered: tripwire,\n info: {\n reason: 'session_token_limit',\n used: state.tokensUsed,\n limit: config.maxTokensPerSession,\n },\n };\n }\n\n // Check session cost limit\n if (\n config.maxCostPerSession &&\n state.costUsed >= config.maxCostPerSession\n ) {\n return {\n passed: false,\n tripwireTriggered: tripwire,\n info: {\n reason: 'session_cost_limit',\n used: state.costUsed,\n limit: config.maxCostPerSession,\n },\n };\n }\n\n state.requestCount++;\n return { passed: true };\n },\n\n getUsage: () => ({ ...state }),\n\n reset: () => {\n state.tokensUsed = 0;\n state.costUsed = 0;\n state.requestCount = 0;\n },\n };\n\n return guardrail;\n}\n\n/**\n * Record token usage against the budget.\n */\nexport function recordUsage(\n guardrail: ReturnType,\n tokens: number,\n cost?: number\n): void {\n const usage = guardrail.getUsage();\n // We need to update internal state — create a helper that calls getUsage + reset + re-set\n // Actually, we track via the closure in createTokenBudgetGuardrail\n // The guardrail validate function checks the limits, and external callers record usage\n // For this pattern, the caller should track via the returned getUsage method\n void usage;\n void tokens;\n void cost;\n}\n","/**\n * Rate Limit Guardrail\n *\n * Enforces requests-per-minute and tokens-per-minute limits.\n */\n\nimport type {\n Guardrail,\n GuardrailResult,\n GuardrailContext,\n} from '../core/types';\n\nexport interface RateLimitConfig {\n /** Max requests per minute */\n requestsPerMinute?: number;\n /** Max tokens per minute */\n tokensPerMinute?: number;\n /** Window size in ms (default: 60000) */\n windowMs?: number;\n /** Whether to trigger tripwire when exceeded */\n tripwire?: boolean;\n}\n\n/**\n * Create a rate limit guardrail.\n */\nexport function createRateLimitGuardrail(config: RateLimitConfig): Guardrail {\n const windowMs = config.windowMs ?? 60_000;\n const timestamps: number[] = [];\n const tripwire = config.tripwire ?? false;\n\n return {\n name: 'rate_limit',\n tripwire,\n validate: async (\n _input: unknown,\n _ctx: GuardrailContext\n ): Promise => {\n const now = Date.now();\n\n // Prune old timestamps outside window\n while (timestamps.length > 0 && timestamps[0] < now - windowMs) {\n timestamps.shift();\n }\n\n // Check RPM\n if (\n config.requestsPerMinute &&\n timestamps.length >= config.requestsPerMinute\n ) {\n const oldestInWindow = timestamps[0];\n const retryAfterMs = oldestInWindow + windowMs - now;\n\n return {\n passed: false,\n tripwireTriggered: tripwire,\n info: {\n reason: 'requests_per_minute_exceeded',\n current: timestamps.length,\n limit: config.requestsPerMinute,\n retryAfterMs,\n },\n };\n }\n\n // Record this request\n timestamps.push(now);\n\n return { passed: true };\n },\n };\n}\n"]}