LX200 C++20 rewrite

.github/prompts/analyze.prompt.md

@@ -0,0 +1,101 @@
+---
+description: Perform a non-destructive cross-artifact consistency and quality analysis across spec.md, plan.md, and tasks.md after task generation.
+---
+
+The user input to you can be provided directly by the agent or as a command argument - you **MUST** consider it before proceeding with the prompt (if not empty).
+
+User input:
+
+$ARGUMENTS
+
+Goal: Identify inconsistencies, duplications, ambiguities, and underspecified items across the three core artifacts (`spec.md`, `plan.md`, `tasks.md`) before implementation. This command MUST run only after `/tasks` has successfully produced a complete `tasks.md`.
+
+STRICTLY READ-ONLY: Do **not** modify any files. Output a structured analysis report. Offer an optional remediation plan (user must explicitly approve before any follow-up editing commands would be invoked manually).
+
+Constitution Authority: The project constitution (`.specify/memory/constitution.md`) is **non-negotiable** within this analysis scope. Constitution conflicts are automatically CRITICAL and require adjustment of the spec, plan, or tasks—not dilution, reinterpretation, or silent ignoring of the principle. If a principle itself needs to change, that must occur in a separate, explicit constitution update outside `/analyze`.
+
+Execution steps:
+
+1. Run `.specify/scripts/bash/check-prerequisites.sh --json --require-tasks --include-tasks` once from repo root and parse JSON for FEATURE_DIR and AVAILABLE_DOCS. Derive absolute paths:
+   - SPEC = FEATURE_DIR/spec.md
+   - PLAN = FEATURE_DIR/plan.md
+   - TASKS = FEATURE_DIR/tasks.md
+   Abort with an error message if any required file is missing (instruct the user to run missing prerequisite command).
+
+2. Load artifacts:
+   - Parse spec.md sections: Overview/Context, Functional Requirements, Non-Functional Requirements, User Stories, Edge Cases (if present).
+   - Parse plan.md: Architecture/stack choices, Data Model references, Phases, Technical constraints.
+   - Parse tasks.md: Task IDs, descriptions, phase grouping, parallel markers [P], referenced file paths.
+   - Load constitution `.specify/memory/constitution.md` for principle validation.
+
+3. Build internal semantic models:
+   - Requirements inventory: Each functional + non-functional requirement with a stable key (derive slug based on imperative phrase; e.g., "User can upload file" -> `user-can-upload-file`).
+   - User story/action inventory.
+   - Task coverage mapping: Map each task to one or more requirements or stories (inference by keyword / explicit reference patterns like IDs or key phrases).
+   - Constitution rule set: Extract principle names and any MUST/SHOULD normative statements.
+
+4. Detection passes:
+   A. Duplication detection:
+      - Identify near-duplicate requirements. Mark lower-quality phrasing for consolidation.
+   B. Ambiguity detection:
+      - Flag vague adjectives (fast, scalable, secure, intuitive, robust) lacking measurable criteria.
+      - Flag unresolved placeholders (TODO, TKTK, ???, <placeholder>, etc.).
+   C. Underspecification:
+      - Requirements with verbs but missing object or measurable outcome.
+      - User stories missing acceptance criteria alignment.
+      - Tasks referencing files or components not defined in spec/plan.
+   D. Constitution alignment:
+      - Any requirement or plan element conflicting with a MUST principle.
+      - Missing mandated sections or quality gates from constitution.
+   E. Coverage gaps:
+      - Requirements with zero associated tasks.
+      - Tasks with no mapped requirement/story.
+      - Non-functional requirements not reflected in tasks (e.g., performance, security).
+   F. Inconsistency:
+      - Terminology drift (same concept named differently across files).
+      - Data entities referenced in plan but absent in spec (or vice versa).
+      - Task ordering contradictions (e.g., integration tasks before foundational setup tasks without dependency note).
+      - Conflicting requirements (e.g., one requires to use Next.js while other says to use Vue as the framework).
+
+5. Severity assignment heuristic:
+   - CRITICAL: Violates constitution MUST, missing core spec artifact, or requirement with zero coverage that blocks baseline functionality.
+   - HIGH: Duplicate or conflicting requirement, ambiguous security/performance attribute, untestable acceptance criterion.
+   - MEDIUM: Terminology drift, missing non-functional task coverage, underspecified edge case.
+   - LOW: Style/wording improvements, minor redundancy not affecting execution order.
+
+6. Produce a Markdown report (no file writes) with sections:
+
+   ### Specification Analysis Report
+   | ID | Category | Severity | Location(s) | Summary | Recommendation |
+   |----|----------|----------|-------------|---------|----------------|
+   | A1 | Duplication | HIGH | spec.md:L120-134 | Two similar requirements ... | Merge phrasing; keep clearer version |
+   (Add one row per finding; generate stable IDs prefixed by category initial.)
+
+   Additional subsections:
+   - Coverage Summary Table:
+     | Requirement Key | Has Task? | Task IDs | Notes |
+   - Constitution Alignment Issues (if any)
+   - Unmapped Tasks (if any)
+   - Metrics:
+     * Total Requirements
+     * Total Tasks
+     * Coverage % (requirements with >=1 task)
+     * Ambiguity Count
+     * Duplication Count
+     * Critical Issues Count
+
+7. At end of report, output a concise Next Actions block:
+   - If CRITICAL issues exist: Recommend resolving before `/implement`.
+   - If only LOW/MEDIUM: User may proceed, but provide improvement suggestions.
+   - Provide explicit command suggestions: e.g., "Run /specify with refinement", "Run /plan to adjust architecture", "Manually edit tasks.md to add coverage for 'performance-metrics'".
+
+8. Ask the user: "Would you like me to suggest concrete remediation edits for the top N issues?" (Do NOT apply them automatically.)
+
+Behavior rules:
+- NEVER modify files.
+- NEVER hallucinate missing sections—if absent, report them.
+- KEEP findings deterministic: if rerun without changes, produce consistent IDs and counts.
+- LIMIT total findings in the main table to 50; aggregate remainder in a summarized overflow note.
+- If zero issues found, emit a success report with coverage statistics and proceed recommendation.
+
+Context: $ARGUMENTS

.github/prompts/clarify.prompt.md

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+---
+description: Identify underspecified areas in the current feature spec by asking up to 5 highly targeted clarification questions and encoding answers back into the spec.
+---
+
+The user input to you can be provided directly by the agent or as a command argument - you **MUST** consider it before proceeding with the prompt (if not empty).
+
+User input:
+
+$ARGUMENTS
+
+Goal: Detect and reduce ambiguity or missing decision points in the active feature specification and record the clarifications directly in the spec file.
+
+Note: This clarification workflow is expected to run (and be completed) BEFORE invoking `/plan`. If the user explicitly states they are skipping clarification (e.g., exploratory spike), you may proceed, but must warn that downstream rework risk increases.
+
+Execution steps:
+
+1. Run `.specify/scripts/bash/check-prerequisites.sh --json --paths-only` from repo root **once** (combined `--json --paths-only` mode / `-Json -PathsOnly`). Parse minimal JSON payload fields:
+   - `FEATURE_DIR`
+   - `FEATURE_SPEC`
+   - (Optionally capture `IMPL_PLAN`, `TASKS` for future chained flows.)
+   - If JSON parsing fails, abort and instruct user to re-run `/specify` or verify feature branch environment.
+
+2. Load the current spec file. Perform a structured ambiguity & coverage scan using this taxonomy. For each category, mark status: Clear / Partial / Missing. Produce an internal coverage map used for prioritization (do not output raw map unless no questions will be asked).
+
+   Functional Scope & Behavior:
+   - Core user goals & success criteria
+   - Explicit out-of-scope declarations
+   - User roles / personas differentiation
+
+   Domain & Data Model:
+   - Entities, attributes, relationships
+   - Identity & uniqueness rules
+   - Lifecycle/state transitions
+   - Data volume / scale assumptions
+
+   Interaction & UX Flow:
+   - Critical user journeys / sequences
+   - Error/empty/loading states
+   - Accessibility or localization notes
+
+   Non-Functional Quality Attributes:
+   - Performance (latency, throughput targets)
+   - Scalability (horizontal/vertical, limits)
+   - Reliability & availability (uptime, recovery expectations)
+   - Observability (logging, metrics, tracing signals)
+   - Security & privacy (authN/Z, data protection, threat assumptions)
+   - Compliance / regulatory constraints (if any)
+
+   Integration & External Dependencies:
+   - External services/APIs and failure modes
+   - Data import/export formats
+   - Protocol/versioning assumptions
+
+   Edge Cases & Failure Handling:
+   - Negative scenarios
+   - Rate limiting / throttling
+   - Conflict resolution (e.g., concurrent edits)
+
+   Constraints & Tradeoffs:
+   - Technical constraints (language, storage, hosting)
+   - Explicit tradeoffs or rejected alternatives
+
+   Terminology & Consistency:
+   - Canonical glossary terms
+   - Avoided synonyms / deprecated terms
+
+   Completion Signals:
+   - Acceptance criteria testability
+   - Measurable Definition of Done style indicators
+
+   Misc / Placeholders:
+   - TODO markers / unresolved decisions
+   - Ambiguous adjectives ("robust", "intuitive") lacking quantification
+
+   For each category with Partial or Missing status, add a candidate question opportunity unless:
+   - Clarification would not materially change implementation or validation strategy
+   - Information is better deferred to planning phase (note internally)
+
+3. Generate (internally) a prioritized queue of candidate clarification questions (maximum 5). Do NOT output them all at once. Apply these constraints:
+    - Maximum of 5 total questions across the whole session.
+    - Each question must be answerable with EITHER:
+       * A short multiple‑choice selection (2–5 distinct, mutually exclusive options), OR
+       * A one-word / short‑phrase answer (explicitly constrain: "Answer in <=5 words").
+   - Only include questions whose answers materially impact architecture, data modeling, task decomposition, test design, UX behavior, operational readiness, or compliance validation.
+   - Ensure category coverage balance: attempt to cover the highest impact unresolved categories first; avoid asking two low-impact questions when a single high-impact area (e.g., security posture) is unresolved.
+   - Exclude questions already answered, trivial stylistic preferences, or plan-level execution details (unless blocking correctness).
+   - Favor clarifications that reduce downstream rework risk or prevent misaligned acceptance tests.
+   - If more than 5 categories remain unresolved, select the top 5 by (Impact * Uncertainty) heuristic.
+
+4. Sequential questioning loop (interactive):
+    - Present EXACTLY ONE question at a time.
+    - For multiple‑choice questions render options as a Markdown table:
+
+       | Option | Description |
+       |--------|-------------|
+       | A | <Option A description> |
+       | B | <Option B description> |
+       | C | <Option C description> | (add D/E as needed up to 5)
+       | Short | Provide a different short answer (<=5 words) | (Include only if free-form alternative is appropriate)
+
+    - For short‑answer style (no meaningful discrete options), output a single line after the question: `Format: Short answer (<=5 words)`.
+    - After the user answers:
+       * Validate the answer maps to one option or fits the <=5 word constraint.
+       * If ambiguous, ask for a quick disambiguation (count still belongs to same question; do not advance).
+       * Once satisfactory, record it in working memory (do not yet write to disk) and move to the next queued question.
+    - Stop asking further questions when:
+       * All critical ambiguities resolved early (remaining queued items become unnecessary), OR
+       * User signals completion ("done", "good", "no more"), OR
+       * You reach 5 asked questions.
+    - Never reveal future queued questions in advance.
+    - If no valid questions exist at start, immediately report no critical ambiguities.
+
+5. Integration after EACH accepted answer (incremental update approach):
+    - Maintain in-memory representation of the spec (loaded once at start) plus the raw file contents.
+    - For the first integrated answer in this session:
+       * Ensure a `## Clarifications` section exists (create it just after the highest-level contextual/overview section per the spec template if missing).
+       * Under it, create (if not present) a `### Session YYYY-MM-DD` subheading for today.
+    - Append a bullet line immediately after acceptance: `- Q: <question> → A: <final answer>`.
+    - Then immediately apply the clarification to the most appropriate section(s):
+       * Functional ambiguity → Update or add a bullet in Functional Requirements.
+       * User interaction / actor distinction → Update User Stories or Actors subsection (if present) with clarified role, constraint, or scenario.
+       * Data shape / entities → Update Data Model (add fields, types, relationships) preserving ordering; note added constraints succinctly.
+       * Non-functional constraint → Add/modify measurable criteria in Non-Functional / Quality Attributes section (convert vague adjective to metric or explicit target).
+       * Edge case / negative flow → Add a new bullet under Edge Cases / Error Handling (or create such subsection if template provides placeholder for it).
+       * Terminology conflict → Normalize term across spec; retain original only if necessary by adding `(formerly referred to as "X")` once.
+    - If the clarification invalidates an earlier ambiguous statement, replace that statement instead of duplicating; leave no obsolete contradictory text.
+    - Save the spec file AFTER each integration to minimize risk of context loss (atomic overwrite).
+    - Preserve formatting: do not reorder unrelated sections; keep heading hierarchy intact.
+    - Keep each inserted clarification minimal and testable (avoid narrative drift).
+
+6. Validation (performed after EACH write plus final pass):
+   - Clarifications session contains exactly one bullet per accepted answer (no duplicates).
+   - Total asked (accepted) questions ≤ 5.
+   - Updated sections contain no lingering vague placeholders the new answer was meant to resolve.
+   - No contradictory earlier statement remains (scan for now-invalid alternative choices removed).
+   - Markdown structure valid; only allowed new headings: `## Clarifications`, `### Session YYYY-MM-DD`.
+   - Terminology consistency: same canonical term used across all updated sections.
+
+7. Write the updated spec back to `FEATURE_SPEC`.
+
+8. Report completion (after questioning loop ends or early termination):
+   - Number of questions asked & answered.
+   - Path to updated spec.
+   - Sections touched (list names).
+   - Coverage summary table listing each taxonomy category with Status: Resolved (was Partial/Missing and addressed), Deferred (exceeds question quota or better suited for planning), Clear (already sufficient), Outstanding (still Partial/Missing but low impact).
+   - If any Outstanding or Deferred remain, recommend whether to proceed to `/plan` or run `/clarify` again later post-plan.
+   - Suggested next command.
+
+Behavior rules:
+- If no meaningful ambiguities found (or all potential questions would be low-impact), respond: "No critical ambiguities detected worth formal clarification." and suggest proceeding.
+- If spec file missing, instruct user to run `/specify` first (do not create a new spec here).
+- Never exceed 5 total asked questions (clarification retries for a single question do not count as new questions).
+- Avoid speculative tech stack questions unless the absence blocks functional clarity.
+- Respect user early termination signals ("stop", "done", "proceed").
+ - If no questions asked due to full coverage, output a compact coverage summary (all categories Clear) then suggest advancing.
+ - If quota reached with unresolved high-impact categories remaining, explicitly flag them under Deferred with rationale.
+
+Context for prioritization: $ARGUMENTS