tools-demo-buildsession

Screen-recorded build sessions: tiles a browser window (2/3, left) and a terminal window (1/3, right) via infrastructure-screencast's window control, keeps both positioned while real work happens in either, and finalizes to mp4 on a duration cap or a clean Ctrl-C stop. No scripted input, no live captions -- this shows genuine work as it happens (Rule 14); caption a finished recording in a later pass via infrastructure_screencast::burn_captions once there is a real transcript to caption from.

Tier	tools
Role	unclassified (baselined)
Path	`crates/tools/demo-buildsession`
Edition	2021
Targets	tools-demo-buildsession, tools_demo_buildsession
Public items	2 across 0 modules
Tests	4

What it is for

Pure layout logic for the build-session recorder. Kept separate from main.rs's I/O orchestration (window control, ffmpeg) so the split itself is unit-tested without touching a display (Gate 2: TDD the decidable logic).

Capabilities

`crate root`

Pure layout logic for the build-session recorder. Kept separate from

Item
`pub const DEFAULT_BROWSER_FRACTION: f64`
`fn browser_terminal_layout(screen_w : u32, screen_h : u32, browser_fraction : f64,) ->(Geometry, Geometry)`

How to use it

No examples/ target and no doctest in this crate's rustdoc. The tests listed under Verification are the closest executable usage.

Module structure

No public modules: the crate root is its whole surface.

Public surface

`crate root`

Item	What it is
`pub const DEFAULT_BROWSER_FRACTION: f64`	Default browser-width fraction of the screen: 2/3 browser, 1/3 terminal.
`fn browser_terminal_layout(screen_w : u32, screen_h : u32, browser_fraction : f64,) ->(Geometry, Geometry)`	Compute `(browser_geometry, terminal_geometry)` for a browser-left / terminal-right tiled layout at the given browser-width fraction of the screen

No pub use re-exports: every item above is declared in this crate.

Boundary

Reaches into infrastructure.

Shares tier tools with 84 other crates: tools-advisory-reach, tools-archive-guard, tools-artifact-scaffold, tools-ask-ai-core, tools-ask-ais, tools-ask-gemini, tools-book, tools-book-report, … (84 total).

_What this crate deliberately does NOT own is a judgment. No committed registry records one for it, so none is stated here._

Where it sits

Tier (ontology)	`tools`
Architectural role (taxonomy)	`unclassified (baselined)`
Location	`crates/tools/demo-buildsession`
Vocabulary in force (lexicon)	`current`

Tier flow. Which tiers this crate's own edges cross.

flowchart LR
  n_tools["tools"] --> n_infrastructure["infrastructure"]

Dependencies

Runtime, in this workspace.

Crate	Tier	Optional	Only on
`infrastructure-screencast`	infrastructure	no	always

Runtime, from outside the workspace.

Crate	Requirement	Features	Optional	Only on
`anyhow`	`^1`	—	no	always
`ctrlc`	`^3`	—	no	always

Development. None.

Build. None.

Depended on by. Nothing in this workspace.

Signal flow — what reaches this crate, and what it reaches.

flowchart LR
  SELF["tools-demo-buildsession"]
  SELF -->|runtime| n_infrastructure_screencast["infrastructure-screencast"]
  classDef self fill:#1f883d,stroke:#1f883d,color:#fff;
  class SELF self;

Feature flags

No Cargo features are defined: every capability is unconditional, so no consumer can receive a half-wired crate.

Targets

Kind	Name	Source
bin	`tools-demo-buildsession`	`src/main.rs`
lib	`tools_demo_buildsession`	`src/lib.rs`

Error model

No public error type was detected: no public item declares a type named *Error, and no public signature returns one.

Operational characteristics

Property	Evidence
async public surface	none detected
async runtime	none detected
database access	none detected
network I/O	none detected
unsafe code	none detected
environment variables	yes

No unsafe block, unsafe fn, unsafe impl or unsafe trait was found by the parser anywhere in this crate's source.

Configuration

Variable	Read in
`HOME`	`src/main.rs`

No workspace crate depends on this one.

Verification

Kind	Count
Unit tests	4
Integration tests	0
Examples	0
Doctests	0

Evidence by module. How often each public module is named by something executable.

Module	Tests	Examples	Consumers
`crate root`	2	0	0

What the tests establish, by name:

boundary_fraction_clamped_below_zero_and_above_one — src/lib.rs
constraint_both_windows_span_full_screen_height_and_partition_the_width — src/lib.rs
valid_default_fraction_gives_two_thirds_browser_one_third_terminal — src/lib.rs
valid_terminal_starts_exactly_where_browser_ends — src/lib.rs

Documentation coverage

Measure	Documented	Total
Public items with rustdoc	2	2
Public modules with a `//!` block	0	0

pie showData
    title Public items with rustdoc
    "Documented" : 2
    "No rustdoc detected" : 0

Metrics

Metric	Value
Rust source files	2
Source lines	191
Code lines	137
Public API items	2
Public modules	0
Tests	4
Examples	0
Cargo features	0
Direct runtime dependencies	3
Workspace reverse dependencies	0

pie showData
    title Public API by kind
    "constant" : 1
    "function" : 1

pie showData
    title Rust source composition
    "Code" : 137
    "Blank or comment" : 54

Generation

Rendered by tools-corpus corpus readme from repository evidence alone, renderer schema 2, lexicon current. No model, network service or database was consulted. Regenerate with tools-corpus corpus readme --write; verify with --check.