PromptCTX

Local context instrument
for macOS

Selected text.
Source attached.
Prompt ready.

PromptCTX captures the passage you need, keeps where it came from, and assembles chosen captures into focused prompt context.

Inspect the product

This download is not notarized by Apple. macOS may block the first opening. Read installation guidance.

Download for Mac

7-day free trial · macOS 13+ · Apple silicon

CAPTURE / 0048 PromptCTX
SELECTED FRAGMENT
Actors isolate shared mutable state.

SOURCE APP Safari

TITLE The Swift Programming Language

ORIGIN docs.swift.org

PROMPT CONTEXT / INCLUDED

Explain how actor isolation changes access to shared state.

Storage
Local JSON
Formatting
Markdown
Budget
Visible

12.4 — PRODUCT VIEW

The interface keeps the evidence in view.

Explore the library and a selected passage with its provenance. This view uses PromptCTX’s native library rows and passage detail with example content.

PromptCTX library and selected passage with provenance, shown with example content.
FIG. 01 Library and passage detail · Example content

28.0 — LINE OF CUSTODY

Using PromptCTX

The current build requires an Apple silicon Mac with macOS 13 or later. Allow Accessibility access in System Settings → Privacy & Security so PromptCTX can capture selected text.

  1. 01

    Capture

    Select a useful passage in another Mac app. Press the default shortcut, Control + Option + Command + C, to save it. You can change the shortcut in Settings.

    TEXT ACQUIRED
  2. 02

    Preserve

    PromptCTX keeps the source app and, when exposed, the page URL and title or local file path. Browser Automation permission is optional for source metadata; text still saves without it. Supported rich text becomes Markdown.

    ORIGIN ATTACHED
  3. 03

    Compose

    Add selected captures to a prompt. Reorder them, add notes and instructions, and trim as needed. Use Copy Prompt to paste into your chosen assistant, or Export to save a file to share with it.

    PROMPT READY

43.7 — CONTEXT ASSEMBLY

Useful context has structure.

Provenance, Markdown, and an estimated token budget help you shape the prompt. The count is a guide, not a guarantee that it fits your chosen model. Example below.

A
CAPTURE / INCLUDED
“Actors isolate shared mutable state.”
APP
Safari
HOST
docs.swift.org
B 
## Actor isolation

**Actors** protect shared state.

- explicit boundaries
- safer access
C
PROMPT DRAFT

Compare these sources. Explain the design trade-offs and cite each origin.

TOKEN ESTIMATE4.2k / 8k

71.2 — LOCAL BOUNDARY

Your library stays on your Mac.

PromptCTX stores captures locally. Activation and update checks use the network; captures are not sent. It has no accounts, analytics, or cloud sync. Copy and export let you take chosen content to another tool. What you paste or upload there is subject to that destination’s privacy practices.

LIBRARY
Local JSON
APP NETWORK REQUESTS
Activation & updates
ACCOUNT
None
CLOUD SYNC
None

89.0 — ONE-TIME PURCHASE

One purchase. No account. No subscription.

PromptCTX is a €19 one-time purchase. The current build supports Apple silicon Macs running macOS 13 or later.

SALES OPEN

Before you buy: this download is not notarized by Apple. macOS may block the first opening. Read installation guidance.

Secure one-time checkout through Stripe.

7-day free trial from first launch. A license is required after the trial. No automatic charge.

Installation guidance

Open the downloaded disk image and drag PromptCTX onto the Applications folder shortcut. Then open PromptCTX from Applications. If macOS blocks PromptCTX, and you trust the download, first try opening the app. Then open System Settings → Privacy & Security and use Open Anyway for PromptCTX, if available. Confirm Open in the next prompt. Managed Macs may prevent this exception. Do not override a warning that the app is damaged or will harm your Mac. Apple’s opening guidance.

Already purchased? Get your license.

  • macOS 13+
  • Apple silicon
  • Local storage