evaluator

name	evaluator
namespace	user
description	Quality evaluation of rendered UGC mp4s — scene segmentation, audio loudness / dead-air, caption density, and per-scene visual analysis. Produces an actionable report (eval.json + eval-report.md) sized for a downstream fixer agent. USE WHEN the user asks to "evaluate / score / grade / review / QA / check quality of" a rendered video, asks "is this video good?", drops an mp4 path with no other instruction, mentions "find issues / problems / artifacts", asks for retention or scroll-stop assessment, or has just rendered something and wants verification before publishing. TRIGGER (EN): "evaluate this video", "score the render", "grade the mp4", "review the final cut", "QA this video", "is this ready to ship", "what's wrong with this video", "find issues in <path.mp4>", "audit the video", "scene-by-scene breakdown", "retention check", "quality gate". See body for ALSO FIRE / DO NOT FIRE / HARD INVARIANTS.

evaluator

Trigger refinements

ALSO FIRE when the user just dropped a path that ends in .mp4 from .ralphy/workspaces/<ws>/projects/<id>/render/ with no other instructions, or when an editor handed off and the user asks "and now?" (any language).

DO NOT FIRE for unrendered projects (handback to editor for ralphy render), for raw research downloads (those go through researcher's analyze-video flow, not eval), or for source media that hasn't been composed yet.

Hard invariants

• Every model call (vision pass) routes through cli/lib/providers/llm.ts → callLLM() via the CLI. No direct OpenAI / fal calls.
• Findings are deterministic outputs of cli/lib/eval/* — don't paraphrase them; pass through verbatim to the fixer agent.
• Keyframe slicing is a cheap diagnostic, NOT a ship gate (#411). A keyframe-only (or structure-only) report can NEVER mark a Unit ship-ready — report.gate.shipReady is hard-false on it. The final gate before forming/publishing a Unit is the native-video pass (full mp4 → model), or deep-style when a STYLE_LOCK/brief exists. Screenshot slicing misses temporal continuity, audio-picture alignment, pacing, and caption sync — exactly the failures that hallucinate when the model only sees stills.

Where this sits in the Unit lifecycle. Eval is phase 14 of the canonical Unit lifecycle. Its native-video gate is the one that flips polished to true in ralphy project status <id> --contract; the quality-gate-failed and native-gate-required stop conditions are derived from eval.json's gate / scoring.verdict. A block verdict feeds the repair loop (phase 15) and the optional polish council (phase 16).

---

You evaluate rendered UGC videos and produce a report that another agent (the fixer) can act on without reading the video itself. The contract is: the report is the handoff.

What this skill is not

• Not a researcher tool. For "analyze this TikTok/Reel from a creator I want to imitate", route to /researcher.
• Not a fixer. The findings list is meant to be read by a separate agent (or the editor / art-director / scenarist) that will execute the fixes. Don't try to fix issues from inside this skill — that's a different role and would skip the user's chance to triage.
• Not a publisher / scheduler. Verdict is informational, not a publish gate.

The single command

ralphy eval video <path-to-mp4>

Auto-detects the project ID when the mp4 lives at .ralphy/workspaces/<ws>/projects/<id>/render/... (the current layout — fixed in #411; the legacy workspace/projects/<id>/ shape still resolves as a fallback). If detected, the report incorporates scenario.json, captions.json, BRIEF.md, STYLE_LOCK.md, and the template name from the project — these unlock the declared-vs-actual findings (duration drift, hook-zone-thin-vo, intent-drift, etc.) that are otherwise unavailable.

Validation modes (--mode, #411)

Eval has four explicit modes, cheapest → most thorough. Choose by what you're doing: a quick smoke check vs. the final gate before a Unit ships.

Mode	What it runs	Model spend	Can mark a Unit ship-ready?
structure	Deterministic only: ffprobe, scene durations, loudness, dead-air, caption density. No model call.	$0	No
keyframe	structure + the cheap per-scene keyframe vision pass (one still/scene, gemini-flash). A smoke check for blank/garbled frames.	~$0.01	No
native-video	structure + a full-mp4 model pass (gemini-3.1-pro-preview sees every frame at native temporal resolution) for temporal continuity, audio-picture alignment, pacing, caption sync, format fit. No style sheet required.	model on full mp4	Yes (when verdict passes)
deep-style	native-video PLUS style-lock / brief / reference conformance scoring.	model on full mp4	Yes (when verdict passes)

ralphy eval video <mp4> --mode native-video      # the final gate before forming/publishing a Unit
ralphy eval video <mp4> --mode keyframe           # cheap diagnostic only — does NOT approve a polished Unit

Default (no --mode) = the final gate. When you omit --mode, eval runs the native-video gate automatically if a model provider is configured (OPENROUTER_API_KEY), and upgrades to deep-style when a project STYLE_LOCK.md / BRIEF.md is discoverable. With NO credentials it falls back to structure and explicitly marks the report not ship-ready (a eval.mode-downgrade info finding records why).

Why keyframe is not enough for a polished Unit: a still never reveals a continuity jump between cuts, a caption that lags the VO, a music hit on the wrong frame, or a draggy hold. Those are exactly the failures the native-video pass catches and the keyframe pass hallucinates around. Use keyframe to triage fast and free; use native-video (or deep-style) as the gate before ralphy unit / publish. The report's gate.shipReady boolean is the authoritative signal — it is hard-false on any non-native report.

Legacy flags (still work, mapped to modes):

• --no-vision ⇒ --mode structure.
• --no-deep-vision ⇒ caps at --mode keyframe (never escalates to the full-mp4 pass).
• --style-sheet / --brief ⇒ implies --mode deep-style.

Deep-style pass (project-specific, anti-generic findings)

When the user asks "validate against my niche / style / creator reference" — or the project carries a style-sheet (typically from ralphy research scrape-profile or ralphy project style-lock) — the deep-style mode scores the full mp4 against every rule in the style sheet's "Vibe & visual register" and "What this creator NEVER does" sections. Trigger it explicitly with --mode deep-style, or just pass --style-sheet (which implies it):

ralphy eval video <mp4> --style-sheet <style-sheet.md> [--brief <BRIEF.md>] [--reference-urls <url> <url> ...]

Both native-video and deep-style produce a structured JSON output at <out-dir>/eval-deep-vision.json (the repair loop, #409, consumes its what_to_redo). It carries:

• overall_verdict — holistic pass/warn/fail
• register_match — declared vs observed cinematographic register, with severity if mismatched
• rule_conformance[] — per-rule pass/warn/fail with verbatim style-sheet quotes and specific timestamp evidence from the rendered video
• brief_conformance[] — same shape, scoring against BRIEF.md intent
• uncanny_mechanism_check — whether the render delivers the style sheet's proprietary aesthetic mechanism or just mimics the surface
• pacing_and_timing — hook / body / closer evaluation
• ai_artifacts[] — concrete timestamp-tagged artifacts the model spotted
• what_works — be honest, what the render did right
• what_to_redo — prioritized 1-6 item fix list with target (start-frame / end-frame / i2v / audio / scene-prompt / model-swap / regen-entire)

Each rule violation also flows into the main findings[] array under style.register-mismatch, style.rule-violation, brief.intent-drift, style.aesthetic-mechanism-missing, or style.timing-* categories so the unified scoring + downstream fixer pipeline pick them up.

When to use deep-style over native-video:

1. The user said "validate against [creator]" / "evaluate against my style" / "is this on-brand for [niche]".
2. The user shows you a scrape-profile style-sheet path and then drops an mp4.
3. The project has a discoverable STYLE_LOCK.md / style-sheet.md (auto-discovered by walking up from the mp4 path). Eval auto-upgrades the default gate to deep-style in that case.

When native-video is the right gate (no style scoring): a generic Unit-readiness check with no creator-style reference — "is this ready to ship", "QA the final cut". This is the default. It still catches temporal/audio/pacing/caption/format failures; it just doesn't score against a specific creator's rules.

When NOT to run the full-mp4 pass at all:

• A fast triage pass mid-iteration — use --mode keyframe (cheap, free-ish) but remember it can't approve a Unit.
• The mp4 is over 40 MB — the model rejects on body size. Re-encode at lower bitrate first.

Standard flags

• --mode <structure|keyframe|native-video|deep-style> — the explicit validation mode (see the table above). Omit for the default final gate (native-video, or deep-style when a STYLE_LOCK/brief is discoverable).
• --no-vision — legacy alias for --mode structure (deterministic only, $0). Use for a quick structure/audio sanity pass; not a ship gate.
• --no-deep-vision — legacy: cap the mode at keyframe (never run the full-mp4 native pass even if a --style-sheet / --brief / project BRIEF.md is present).
• --deep-vision-model <id> — override the full-mp4 model. Default google/gemini-3.1-pro-preview. For cheaper smoke tests, swap to google/gemini-2.5-pro.
• --project <id> — force project context when the mp4 was moved out of the project tree.
• --no-project — explicitly evaluate as a standalone video (skips scenario.json-derived findings).
• --out-dir <path> — override where eval.json + eval-report.md + eval-deep-vision.json land. Default: project dir, or the mp4's parent for standalone.

The command returns JSON with verdict, score, mode, shipReady, gateReason, findings (count), and the output paths. shipReady is the gate to honor before forming/publishing a Unit — never form a Unit off a shipReady: false report unless the user explicitly accepted a cheap-mode result.

How to read the report

Two files written:

• eval.json — machine contract. The fixer agent reads this. Schema in references/report-schema.md.
• eval-report.md — same data flattened for humans. Show the user this one.

The shape that matters: report.findings[] is the actionable list. Each finding has:

• id (F1, F2, …) — stable ref to call out in chat
• category — taxonomy like audio.loudness, vision.text, structure.duration-drift
• severity — info | warn | fail
• sceneIndex + timestampSec — where in the video, when applicable
• message — what's wrong (specific, not generic)
• fixHint — what kind of fix, conceptually
• fixCommand — a copy-pasteable ralphy / ffmpeg command if one applies

scoring.verdict is pass, warn, or fail — a quality summary. report.gate is the readiness signal: gate.mode (which mode ran), gate.nativeVideo (was it a full-mp4 pass), and gate.shipReady (the single boolean a Unit-forming step gates on). A pass verdict from a keyframe gate still has shipReady: false — keyframe slicing cannot approve a polished Unit. The user always decides whether to ship, but do not present a non-native report as ship-ready approval.

Workflow

1. Confirm the path. If the user gave a project id instead of an mp4 path, resolve to .ralphy/workspaces/<ws>/projects/<id>/render/final.mp4 (or whatever the project's render output is — check composition-props.json if the path isn't obvious).
2. Run ralphy eval video <path>. Omit --mode for the final gate — it runs native-video automatically (or deep-style when a STYLE_LOCK/brief is discoverable). Use --mode keyframe only when the user explicitly wants a fast/cheap triage and accepts it isn't a ship gate.
3. Show the markdown report to the user, highlighting gate.shipReady, the verdict, and the top 3-5 findings by severity. If shipReady is false because the run was a cheap mode, say so and offer to re-run native-video.
4. Hand off if the user wants fixes. The fixer agent reads eval.json directly — don't summarize the findings into your own prose, just point at the path. Suggested handoffs by finding category:
   • vision.text, vision.composition, vision.ai-artifacts, vision.quality → /ralph-art-director (regen affected keyframes / tweak prompts).
   • structure.duration-drift, structure.hook-zone-* → /ralph-scenarist (re-time / re-script).
   • audio.*, format.* → /ralph-editor (loudnorm / re-render / re-cut).
   • captions.* → /ralph-editor (regenerate captions or tighten the script).

When findings are clearly false-positives

The eval pipeline is tuned for the common UGC cases. Some templates legitimately violate "rules" — the brainrot-ai-meme top-half is often a single static image for the whole clip, which fires structure.hook-zone-static. Don't suppress in code; instead, in the chat handoff, mark such findings as expected-for-template so the fixer agent skips them.

Handoff to a fixer agent

When the user says "fix the issues" or similar, a downstream agent will read eval.json. The minimum it needs from you:

• Path to the report
• Path to the original mp4
• Project id (if any)
• Optional: which finding ids to skip (template false-positives)

Do not try to fix from inside evaluator. The skill ends at the report.

References

• references/report-schema.md — full JSON schema of eval.json
• cli/lib/eval/findings.ts — rule taxonomy + thresholds (the source of truth for category and severity ladders)
• MODELS.md — vision model used (google/gemini-2.5-flash via OpenRouter)
• docs/green-zone.md (when added) — the safe-zone geometry the vision prompt references