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Master Screenwriter

It's the scene where we meet the hero and the hero does something — like saving a cat — that defines who he is and makes us, the audience, like him.

Master Screenwriter applies the industry's most battle-tested structural frameworks — anchored in Blake Snyder's Save the Cat BS2 beat sheet and reinforced by Syd Field's Three-Act Paradigm, John Truby's 22-step system, and Robert McKee's scene principles — to guide you from raw premise to polished outline. It's for screenwriters, TV pilots, and narrative designers who want their structure to be airtight before they write a single scene. Unlike generic writing assistance, this skill enforces page-count milestones, names every beat, and diagnoses structural gaps against industry benchmarks.

By Blake Snyder (primary); Syd Field, John Truby, Robert McKee · Free
Specimen 01 · Live diagnosisMaster Screenwriter
Input

“It's about a burned-out ER doctor who gets assigned to a rural clinic in a dying small town as punishment, and slowly realizes the town is hiding a…”

Diagnosis
Let's build your screenplay from the structure up.
Full transcript ↓
Calibrated referenceagent-skills.ai
The gap

Build your screenplay beat by beat — every page has a purpose, from Opening Image to Final Image

The core engine is Blake Snyder's Beat Sheet 2 (BS2): 15 named beats with specific page targets that serve as structural checkpoints for any feature-length screenplay. These include the Opening Image (p. 1), Theme Stated (p. 5), Catalyst/Inciting Incident (p. 12), Break into Two (p. 25), Midpoint (p. 55), All Is Lost (p. 75), Dark Night of the Soul (pp. 75–80), Break into Three (p. 80), and Final Image (p. 110). Layered onto this skeleton is Syd Field's Three-Act Paradigm for macro-level act turns, John Truby's character-arc system (wound, ghost, moral need, revelation), and Robert McKee's scene-construction principles (turning points, gap between expectation and result). The methodology is applied through three primary outputs: a logline with irony and mental-movie clarity, a 15-beat blueprint with scene descriptions, and a scene-by-scene step outline that bridges blueprint to first draft.

The problem

Most aspiring screenwriters write scenes before their structure is solid — and discover the story doesn't work on page 85. The standard industry failure modes are a weak or misplaced Midpoint, an All Is Lost moment that lands too early or carries no weight, and a protagonist with no internal arc to mirror the external plot. Save the Cat's BS2 exists precisely because Hollywood readers reject spec scripts in the first 25 pages — not because of bad dialogue, but because the story hasn't broken into Act Two yet.

The solution

Stop writing into the void. By the time you type your first FADE IN, every structural milestone will be placed, every beat will have a purpose, and your protagonist's arc will be locked to the story's thematic argument — so your draft solves story problems before they're written in.

You bring
  • A story premise, concept, or 'what if' idea — even a rough one
  • A protagonist and the world they inhabit
  • An existing outline, treatment, or draft pages (for diagnosis)
  • Your target format: feature film, TV pilot, or short
You get
  • A complete 15-beat BS2 blueprint with page targets and one-paragraph scene descriptions for each beat
  • A one-sentence logline with irony and a clear 'mental movie'
  • A character arc map: wound, ghost, want, need, flaw, and revelation
  • A scene-by-scene step outline ready to guide your first draft
In action

Watch the methodology work.

Three specimens from a single real session: the same situation, unaided and calibrated, the full transcript, and the skill answering live in the channel where the work happens.

Fig.01The same situation, two ways
Specimens A · B
Specimen AVague
Unaided

“You have a concept you love, 40 pages of scenes written out of order, a protagonist whose motivation shifts depending on the scene, and a nagging suspicion your second act is 'just things happening.' You've rewritten the opening three times and still don't know what your story is actually about.”

×Vague — nothing concrete to act on.
Specimen BCalibrated
With Master Screenwriter

“You have a 15-beat blueprint with every structural milestone placed at its correct page, a one-sentence logline that passes the irony test, a character arc map that connects your protagonist's wound to your theme, and a step outline that sequences every scene in all three acts — before you've written a single page of formatted script.”

Specific, grounded, and ends with one clear next step.
Fig.02A real session, unedited
In-app · assistant
Master ScreenwriterClaude
Master Screenwriter
Let's build your screenplay from the structure up. Give me your premise — even one rough sentence — and I'll tell you what kind of story it is, test the logline for irony and mental-movie clarity, and then we'll map it to all 15 BS2 beats before you write a single scene. What's the idea?
It's about a burned-out ER doctor who gets assigned to a rural clinic in a dying small town as punishment, and slowly realizes the town is hiding a medical cover-up from a mining company.
Strong bones — this is a classic 'Fish Out of Water' genre with a Thriller B-plot, which is a reliable combination (think Erin Brockovich meets Doc Hollywood). Your logline draft: 'A cynical ER doctor exiled to a crumbling rural clinic uncovers a corporate cover-up killing the very patients he's too burned out to care about.' That has irony — the doctor who doesn't want to be there is the only one who can save the town — and a clear mental movie. Now let's pressure-test your Act One. Where does your doctor's world crack open? That's your Catalyst, and it needs to land at page 12. What's the first sign something is wrong in the clinic?
I was thinking he notices an unusually high rate of a rare lung condition in patients, all from the same part of town near the old mine.
That's a solid Catalyst — place it at pp. 10–12, before he's emotionally invested enough to act. Now here's the structural challenge: your Break into Two at p. 25 is the moment he chooses to investigate instead of waiting out his reassignment. That choice has to feel earned, which means your Theme Stated beat at p. 5 needs to establish what this story is actually about internally — not the cover-up, but the doctor's arc. What's broken in him? A burned-out doctor who stopped caring is your ghost. The theme is probably something like: 'You can't heal others until you're willing to be present for them.' Does that track, or is his wound something different?
Yeah — he had a patient die because he was distracted during a long shift, and he blamed the hospital system instead of himself. That's why he got into trouble.
Perfect — that's your ghost (the patient's death), your flaw (deflecting blame onto systems), and your need (to take personal responsibility). Now your All Is Lost moment at p. 75 writes itself: the mining company exposes that he mishandled a prior case and uses it to discredit his investigation. He loses credibility, the townspeople turn on him, and he almost leaves — replicating the moment he ran from his ghost. The Dark Night is him confronting whether the flaw he blamed on the hospital was always in him. And his Break into Three is the moment he goes back anyway, this time with no institutional cover. Shall I build out the full 15-beat sheet from here, or do you want to nail the Midpoint first — that's the moment he goes from reactive investigator to proactive one, usually a false victory around p. 55?
Let's do the full beat sheet — this is way more structured than anything I've had before.
Reply to Master Screenwriter
What the skill is doing
01BS2 Beat Sheet Generator
02Logline Forge
03Character Arc Profiler
Fig.03The same skill, in the channel you already use
WhatsApp · live
9:41
MSMaster Screenwritertyping…
Messages are end-to-end encrypted. No one outside of this chat can read them.
Today
It's about a burned-out ER doctor who gets assigned to a rural clinic in a dying small town as punishment, and slowly realizes the town is hiding a me…9:14✓✓
Let's build your screenplay from the structure up.9:14
Message

The same skill, where the work happens.

No new app to learn. The methodology runs over the WhatsApp Business API, so the answer lands as a reply in the thread you’re already in — same rigour, zero context-switch.

Reads the situation, names the pattern, returns one concrete next move.
Delivered in seconds, inside a conversation that already exists.
Specimen · WhatsApp Business API · live
Capabilities

What it does, specifically.

Each capability is a distinct move drawn straight from the source methodology — not a generic assistant guessing.

CapabilityC-01

BS2 Beat Sheet Generator

Takes your premise and builds a complete Save the Cat Beat Sheet 2 with all 15 named beats and their specific page targets. Each beat gets a one-paragraph scene description so you can see the whole film before writing a word. The sheet flags any beats that are structurally ambiguous or under-developed.

Based on Blake Snyder's BS2 framework from Save the Cat!, which assigns page-number targets to each of 15 beats (Opening Image p.1 through Final Image p.110) as repeatable structural anchors across all genres.
CapabilityC-02

Logline Forge

Crafts a one-sentence logline that passes Snyder's two-element test: irony (a built-in conflict that creates audience curiosity) and a 'mental movie' (enough specificity to picture the film). Iterates until the logline sells the concept in a single breath.

Rooted in Snyder's rule that the logline is not a summary but a proof of concept — if you can't state your story with irony and a mental movie in one sentence, the story's central concept isn't clear enough to write.
CapabilityC-03

Character Arc Profiler

Maps the protagonist's full internal journey: their psychological wound (ghost), surface want, deeper need, character flaw that blocks the need, and the revelation moment that resolves the arc. Ensures the internal arc mirrors and earns the external plot resolution.

Synthesizes John Truby's 22-step system (The Anatomy of Story) for weakness/need/ghost with Snyder's A Story / B Story interplay — where the B Story (usually a relationship) carries the theme and eventually rescues the protagonist in Act Three.
CapabilityC-04

Script Structural Diagnosis

Takes submitted pages, a treatment, or a step outline and benchmarks each act against BS2 page targets, identifies missing or misplaced beats, and scores structural health. Outputs a prioritized fix list: what to address first, why it's breaking the story, and a specific prescription.

Applies Syd Field's Three-Act Paradigm plot-point tests (Plot Point 1 must occur between pp. 25–27, Plot Point 2 between pp. 85–90) and Snyder's beat-page tolerance ranges as objective structural benchmarks.
CapabilityC-05

Scene Construction Workshop

Takes a specific scene and applies McKee's scene-construction principles: identifies the scene's turning point (the gap between expected and actual outcome), strengthens action/reaction beats, adds subtext to dialogue, and shifts the scene from on-the-nose to visual storytelling.

Grounded in Robert McKee's Story principles of scene design — every scene must turn, moving characters from one value state (positive/negative) to its opposite, and the best scenes do this through subtext and behavior rather than exposition.
Tested

Graded before it shipped.

Every skill is scored against independent scenarios for methodology fidelity before it goes live — not vibes, a rubric.

What it produces
OutputD-01

15-Beat BS2 Blueprint

A structured document listing all 15 Save the Cat beats with their page targets, a one-paragraph scene description for each, and notes on how each beat connects to the controlling idea and character arc.

OutputD-02

Character Arc Map

A one-page profile of the protagonist's internal journey: ghost/wound, surface want, deeper need, flaw, moral argument, and the revelation beat that closes their arc. Includes how the B Story character embodies the theme.

OutputD-03

Step Outline Document

A scene-by-scene breakdown of the entire screenplay in one or two sentences per scene, sequenced across all three acts. The bridge between the BS2 blueprint and the first draft.

OutputD-04

Structural Diagnosis Report

A scored audit of submitted story material against BS2 benchmarks, identifying missing beats, off-page milestones, and arc weaknesses — with a prioritized fix list and specific rewrites suggested for each issue.

The source

Grounded in the original work.

Every answer traces back to a real source and the practitioner who wrote it — not a secondhand summary. Here is the source of record.

Source authorA-01

Blake Snyder (primary); Syd Field, John Truby, Robert McKee

Blake Snyder was a produced Hollywood screenwriter whose Save the Cat! (2005) became the de facto structural bible for spec scripts, selling over 300,000 copies and shaping how studios evaluate submissions. His BS2 Beat Sheet — 15 named beats with precise page-number targets — is now taught in virtually every major film school and used by professional script consultants worldwide. The broader methodology integrates Syd Field's Three-Act Paradigm (Screenplay, 1979), John Truby's 22-step Anatomy of Story, and Robert McKee's Story seminar (a $600+ industry institution).

Status · Inspired by Blake Snyder (primary); Syd Field, John Truby, Robert McKee’s work — not yet claimed. Are you Blake Snyder (primary); Syd Field, John Truby, Robert McKee?
Primary sourceS-01

Save the Cat! The Last Book on Screenwriting You'll Ever Need

by Blake Snyder (primary); Syd Field, John Truby, Robert McKee

Snyder: produced Hollywood screenwriter, 300,000+ copies sold, industry-standard framework taught at USC, UCLA, and NYT/AFI programs; McKee's Story seminar attended by 100,000+ working writers.

Read the original ↗
Citationblakesnyder.com
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At launchI have a premise I've been circling for months but no solid structure yet. Can we start with the logline — test it for irony and mental movie — and then build the full BS2 beat sheet from there?