# Evaluate Landing Page > Scores a launched landing page from real performance evidence inside an existing eval loop — writes a cycle eval snapshot and appends the loop results ledger. Use for post-launch CRO cycles backed by analytics, experiment results, recordings, form-funnel data, or qualified manual metric notes. Not for designing the next page brief or a redesign (use brief-landing-page), channel strategy (use plan… - **Type:** Skill - **Install:** `agentstack add skill-hungv47-meta-skills-evaluate-landing-page` - **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior - **Seller:** [hungv47](https://agentstack.voostack.com/s/hungv47) - **Installs:** 0 - **Category:** [Data & Analytics](https://agentstack.voostack.com/c/data-and-analytics) - **Latest version:** 0.1.0 - **License:** MIT - **Upstream author:** [hungv47](https://github.com/hungv47) - **Source:** https://github.com/hungv47/meta-skills/tree/main/skills/marketing/evaluate-landing-page - **Website:** https://skills.forsvn.com/ ## Install ```sh agentstack add skill-hungv47-meta-skills-evaluate-landing-page ``` Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent. ## About # Landing Page Eval — Orchestrator *Evaluation skill. Converts launched landing-page evidence into a cycle snapshot, a ledger row, and narrowly-scoped next action inside an existing eval loop.* **Core Question:** "Did this landing-page cycle create measurable signal strong enough to keep, discard, watch, or block, and what should the next strategy/execution skill know?" > Why, philosophy, methodology, when NOT to use, history: [`references/playbook.md`](references/playbook.md) [PLAYBOOK]. ## Critical Gates 1. **Existing eval loop required.** If `.forsvn/loops/[slug]/program.md` + `context.md` absent → `NEEDS_CONTEXT`, recommend `/run-pipeline`. This skill does not create loops. 2. **Measurement evidence required.** Not a generic heuristic audit. Require ≥1 metric source, measurement window, and current value for the loop's primary metric. 3. **One primary metric decides the ledger row.** Secondary metrics and qualitative evidence explain diagnosis; they do not override the primary metric unless `program.md` defines an explicit guardrail failure. 4. **No fabricated analytics.** Unknown values stay unknown. Manual notes only when labeled operator-supplied + tied to date/window/source. 5. **Attribution confidence must be explicit.** Every verdict includes sample size or traffic volume when available, baseline comparability, confounders, and confidence: `high | medium | low | blocked`. 6. **Evaluation does not redesign.** Recommend next changes; route actual brief/revision work to `brief-landing-page`. ## Responsibility Split `/run-pipeline` owns loop setup, `program.md`, `context.md`, `results.tsv` schema, durable learning ledger. **This skill** owns post-launch landing-page evidence snapshots for a loop cycle. `/brief-landing-page` owns new-page and redesign briefs after an eval identifies what should change. ## Inputs **Required:** loop slug/path · page URL/route · measurement window · primary metric value + source. **Recommended/optional:** baseline or prior cycle row · traffic/sample size · guardrail metrics (bounce, form completion, qualified lead rate, revenue, page speed, spend efficiency) · experiment notes (variant split, assignment, test integrity) · qualitative evidence (heatmaps, recordings, comments, sales notes) · strategy/execution artifacts (what was changed). ## Outputs Primary artifact: `.forsvn/loops/[slug]/evals/YYYY-MM-DD-cycle-N.md`. Side effects: append one row to `.forsvn/loops/[slug]/results.tsv` via `scripts/append-loop-result.ts`; update `learnings.md` ONLY for high-confidence keep/discard reusable lessons (critic-gated); run `manifest-sync.ts`. ## Agent Manifest + Dispatch 4 sub-agents: Layer 1 parallel (Metric Ingest + Diagnosis) → Layer 2 (Recommendation) → Layer 3 (Critic). Critic FAIL → revise once; still FAIL → no ledger row + return `BLOCKED`. Cycle number = `last results.tsv cycle + 1` unless operator names a cycle that has no existing eval artifact. Full per-agent focus + per-layer dispatch tables + critic revision-cycle semantics + side-effects ALL-OR-NOTHING on FAIL: [`references/procedures/dispatch-mechanics.md`](references/procedures/dispatch-mechanics.md) [PROCEDURE]. ## Pre-Dispatch Canonical: `references/_shared/pre-dispatch-protocol.md` + `_shared/eval-loop-spec.md`. **Hard-blocks:** missing `program.md`/`context.md` → NEEDS_CONTEXT + recommend `/run-pipeline`; no measurement evidence → BLOCKED; custom 10+ col `results.tsv` → warn + require hand-edit. **Cold Start:** 5 bundled questions (loop slug · page URL · window · primary metric value/baseline · what changed). Full read-order + warm/cold templates + `--fast` behavior: [`references/procedures/pre-dispatch.md`](references/procedures/pre-dispatch.md) [PROCEDURE]. ## Artifact Contract - **Path:** `.forsvn/loops/[slug]/evals/YYYY-MM-DD-cycle-N.md`. **Lifecycle:** `evaluation`. - **Body sections (8):** Title · Verdict · Evidence (6-col table) · What Changed · Diagnosis · Next Cycle Recommendation · Results Row · Learning Promotion. - **Results Row (8 cols):** `cycle date artifact primary_metric value baseline status description`. `status` ∈ `keep|discard|watch|blocked` (Critic Hard Fail #6 otherwise). - **Cross-stack contract:** consumed by future lp-eval cycles, `brief-landing-page --rev=N+1`, human loop reviewers. Schema changes require atomic update across `_shared/eval-loop-spec.md` + downstream callers. Full byte-identical template + frontmatter spec + Evidence/Results/Learning formats + custom-schema limitation: [`references/format-conventions.md`](references/format-conventions.md) [PROCEDURE]. ## Results Row Helper ```bash bun scripts/append-loop-result.ts "" \ --artifact evals/YYYY-MM-DD-cycle-N.md \ --metric "" --value "" --baseline "" \ --status "" --description "" ``` Do not append on Critic FAIL — return `BLOCKED` instead. ## Critic Override Protocol When operator ships a cycle despite critic FAIL — **log the override BEFORE writing artifact or ledger row:** `bun scripts/log-critic-override.ts --skill evaluate-landing-page …`. Full protocol (invocation, 3-override escalation, two rules an override never relaxes): [`references/_shared/critic-override-protocol.md`](references/_shared/critic-override-protocol.md) [PROCEDURE]. ## Anti-Patterns [`references/anti-patterns.md`](references/anti-patterns.md) [ANTI-PATTERN] — 10 lp-eval patterns + 4 cross-cutting marketing-stack rows. Most common: scope drift to redesign (Gate 6 + Critic "Boundary Control"), confidence inflation (Gate 5 + Critic "Attribution Honesty"), low-confidence learning promotion (Critic Hard Fail #7), missing primary metric source-window (Critic Hard Fail #2). ## Worked Example Landing-page CRO cycle (section-level bottleneck diagnosis from conversion evidence, critic PASS): [`references/examples/landing-page-eval-cycle-walkthrough.md`](references/examples/landing-page-eval-cycle-walkthrough.md). ## Durable Rules (protected) ## Completion Status - **DONE** — eval artifact written, ledger row appended, critic passed - **DONE_WITH_CONCERNS** — artifact + row written, but confidence low/medium or confounders material - **NEEDS_CONTEXT** — missing loop or required metric evidence - **BLOCKED** — contradictory data, filesystem failure, or critic failed after revision ## References - `references/playbook.md`, `format-conventions.md`, `anti-patterns.md` - `references/procedures/{pre-dispatch, dispatch-mechanics}.md` - `references/_shared/{eval-loop-spec, before-starting-check, manifest-spec, mode-resolver, pre-dispatch-protocol, anti-sycophancy, artifact-contract-template, thin-critic-rubric, critic-override-protocol}.md` - `references/_shared/execution-policy.md` — session execution profile (single-vs-multi) - 4 sub-agents in `agents/`; `critic-agent.md` holds the 6-dimension 0-10 rubric (Loop Fit / Metric Integrity / Attribution Honesty / Decision Discipline / Boundary Control / Ledger Correctness) + 4-tier Verdict + 7 Hard Fails - **Sibling coordination:** `brief-landing-page` (this skill routes recommendations TO it but does not produce briefs); `run-pipeline` (owns loop scaffolding + ledger schema + durable learnings) ## Source & license This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code. - **Author:** [hungv47](https://github.com/hungv47) - **Source:** [hungv47/meta-skills](https://github.com/hungv47/meta-skills) - **License:** MIT - **Homepage:** https://skills.forsvn.com/ Install and usage instructions live in the source repository linked above. ## Pricing - **Free** — Free ## Security capabilities Automated source analysis of v0.1.0 — what this tool can access: - **Network access:** no - **Filesystem access:** no - **Shell / process execution:** no - **Environment & secrets:** no - **Dynamic code execution:** no *"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.* ## Versions - **0.1.0** — security scan: passed — Imported from the upstream source. ## Links - Listing page: https://agentstack.voostack.com/l/skill-hungv47-meta-skills-evaluate-landing-page - Seller: https://agentstack.voostack.com/s/hungv47 - Browse the marketplace: https://agentstack.voostack.com/browse --- Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.