tools-sighting-measure

Measures the sighting archive: conversation closure, profile churn, presence density, photo reuse across profiles, and self-description field completeness. Every statistic is computed by a pure function over rows, so the arithmetic is tested without a database and the numbers are reproducible from the corpus rather than estimated.

Tier	tools
Role	tooling
Path	`crates/tools/sighting-measure`
Edition	2021
Targets	tools-sighting-measure, tools_sighting_measure
Public items	17 across 0 modules
Tests	14

What it is for

Measures the sighting archive and reports numbers a product document can cite as a baseline.

Five measurements, each a pure function over rows that the binary reads from Postgres: conversation closure, profile churn, presence density, photo reuse across profiles, and self-description field completeness. The arithmetic lives here so it is tested against fixture rows with no database attached; the binary supplies real rows and prints the same structs.

Every result carries the corpus it was computed over. A statistic without its denominator is not a baseline, and the store grows while the tap runs — so a number is only meaningful with the row count and the as-of instant beside it.

Capabilities

`crate root`

Measures the sighting archive and reports numbers a product document can cite as a baseline.

Item
`fn closure_stats(msgs : & Message, observer : & str, as_of : DateTime <Utc>, silent_after : Duration,) -> ClosureStats`
`fn churn_stats(lives : & ProfileLife, as_of : DateTime <Utc>, dark_after : Duration,) -> ChurnStats`
`fn density_stats(rows : & Position) -> DensityStats`
`fn reuse_stats(rows : & MediaRow) -> ReuseStats`

`ChurnStats`

Measures the sighting archive and reports numbers a product document can cite as a baseline.

Item
`pub struct ChurnStats`

`ClosureStats`

Measures the sighting archive and reports numbers a product document can cite as a baseline.

Item
`pub struct ClosureStats`

`DensityStats`

Measures the sighting archive and reports numbers a product document can cite as a baseline.

Item
`pub struct DensityStats`

`Ending`

Measures the sighting archive and reports numbers a product document can cite as a baseline.

Item
`pub enum Ending`
`fn ending_of(msgs : & Message, observer : & str, as_of : DateTime <Utc>, silent_after : Duration,) -> Ending`

`FieldFill`

Measures the sighting archive and reports numbers a product document can cite as a baseline.

Item
`pub struct FieldFill`
`fn facet_fill(pairs : & (& str, usize), total : usize) -> Vec <FieldFill>`

`MediaRow`

Measures the sighting archive and reports numbers a product document can cite as a baseline.

Item
`pub struct MediaRow`

`Message`

Measures the sighting archive and reports numbers a product document can cite as a baseline.

Item
`pub struct Message`

`Position`

Measures the sighting archive and reports numbers a product document can cite as a baseline.

Item
`pub struct Position`

`ProfileLife`

Measures the sighting archive and reports numbers a product document can cite as a baseline.

Item
`pub struct ProfileLife`
`ProfileLife :: fn reobserved(& self) -> bool`

`ReuseStats`

Measures the sighting archive and reports numbers a product document can cite as a baseline.

Item
`pub struct ReuseStats`

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 struct Message`	One message, reduced to what closure depends on.
`pub enum Ending`	How a conversation ended, from the observer's side.
`pub struct ClosureStats`	—
`fn ending_of(msgs : & Message, observer : & str, as_of : DateTime <Utc>, silent_after : Duration,) -> Ending`	Classify one conversation
`fn closure_stats(msgs : & Message, observer : & str, as_of : DateTime <Utc>, silent_after : Duration,) -> ClosureStats`	Group messages by conversation and classify every one.
`pub struct ProfileLife`	One profile's life, reduced to what churn depends on
`ProfileLife :: fn reobserved(& self) -> bool`	Was this profile ever captured a second time? Only then could an edit have been seen
`pub struct ChurnStats`	—
`fn churn_stats(lives : & ProfileLife, as_of : DateTime <Utc>, dark_after : Duration,) -> ChurnStats`	—
`pub struct Position`	—
`pub struct DensityStats`	—
`fn density_stats(rows : & Position) -> DensityStats`	—
`pub struct MediaRow`	—
`pub struct ReuseStats`	—
`fn reuse_stats(rows : & MediaRow) -> ReuseStats`	—
`pub struct FieldFill`	One field's fill rate
`fn facet_fill(pairs : & (& str, usize), total : usize) -> Vec <FieldFill>`	Build fill rates from `(field, filled)` pairs against a shared row total.

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

Boundary

Reaches into identity.

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)	`tooling`
Location	`crates/tools/sighting-measure`
Vocabulary in force (lexicon)	`current`

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

flowchart LR
  n_tools["tools"] --> n_identity["identity"]

Dependencies

Runtime, in this workspace.

Crate	Tier	Optional	Only on
`identity-tenant`	identity	no	always

Runtime, from outside the workspace.

Crate	Requirement	Features	Optional	Only on
`anyhow`	`^1`	—	no	always
`chrono`	`^0.4`	`serde`	no	always
`clap`	`^4`	`derive`, `env`	no	always
`serde`	`^1`	`derive`	no	always
`serde_json`	`^1`	—	no	always
`sqlx`	`^0.8`	`runtime-tokio`, `postgres`, `chrono`, `uuid`, `json`	no	always
`tokio`	`^1`	`full`	no	always

Development, in this workspace.

Crate	Tier	Optional	Only on
`tools-cli-conformance`	tools	no	always

Build. None.

Depended on by. Nothing in this workspace.

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

flowchart LR
  SELF["tools-sighting-measure"]
  SELF -->|development| n_tools_cli_conformance["tools-cli-conformance"]
  SELF -->|runtime| n_identity_tenant["identity-tenant"]
  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-sighting-measure`	`src/main.rs`
lib	`tools_sighting_measure`	`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	yes
database access	yes
network I/O	none detected
unsafe code	none detected
environment variables	none detected

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

Configuration

No environment variable is read with a literal name anywhere in this crate. A variable whose key is computed at run time cannot be listed here, and is not claimed to be absent.

No workspace crate depends on this one.

Verification

Kind	Count
Unit tests	14
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`	16	0	0

What the tests establish, by name:

a_conversation_inside_the_reply_window_is_not_yet_abandoned — src/lib.rs
a_corpus_shorter_than_the_window_reports_no_dark_rate_rather_than_zero — src/lib.rs
a_missing_hash_never_counts_as_a_match — src/lib.rs
a_profile_standing_still_is_not_counted_as_having_moved — src/lib.rs
an_empty_corpus_reports_zero_rather_than_dividing_by_zero — src/lib.rs
an_image_under_one_profile_is_not_reuse — src/lib.rs
churn_counts_only_profiles_seen_more_than_once_as_able_to_change — src/lib.rs
closure_rate_excludes_the_still_open_from_the_numerator_only — src/lib.rs
fill_rates_sort_by_how_often_people_actually_answer — src/lib.rs
message_order_does_not_depend_on_row_order — src/lib.rs
one_far_away_observation_does_not_stretch_the_box_across_a_continent — src/lib.rs
one_side_talking_is_never_counted_as_an_ending — src/lib.rs
the_side_that_spoke_last_is_not_the_side_that_went_silent — src/lib.rs
cli_definition_conforms — src/main.rs

Documentation coverage

Measure	Documented	Total
Public items with rustdoc	8	17
Public modules with a `//!` block	0	0

pie showData
    title Public items with rustdoc
    "Documented" : 8
    "No rustdoc detected" : 9

Metrics

Metric	Value
Rust source files	2
Source lines	1154
Code lines	932
Public API items	17
Public modules	0
Tests	14
Examples	0
Cargo features	0
Direct runtime dependencies	8
Workspace reverse dependencies	0

pie showData
    title Public API by kind
    "enum" : 1
    "function" : 6
    "method" : 1
    "struct" : 9

pie showData
    title Rust source composition
    "Code" : 932
    "Blank or comment" : 222

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.

What it is for

Capabilities

crate root

ChurnStats

ClosureStats

DensityStats

Ending

FieldFill

MediaRow

Message

Position

ProfileLife

ReuseStats

How to use it

Module structure

Public surface

Boundary

Where it sits

Dependencies

Feature flags

Targets

Error model

Operational characteristics

Configuration

Related capabilities

Verification

Documentation coverage

Metrics

Generation

`crate root`

`ChurnStats`

`ClosureStats`

`DensityStats`

`Ending`

`FieldFill`

`MediaRow`

`Message`

`Position`

`ProfileLife`

`ReuseStats`