application tier

`application-audit-log`

Forge module wrapping foundation-audit-log.

Forge module wrapping foundation-audit-log.

Tier	application
Role	unclassified (baselined)
Path	`crates/application/audit-log`
Edition	2024
Targets	application_audit_log, pg_forge_audit_log
Public items	24 across 2 modules
Tests	13

What it is for

application-audit-log — wraps foundation-audit-log.

Capabilities

`AuditLogModule`

application-audit-log — wraps foundation-audit-log.

Item
`pub struct AuditLogModule`
`AuditLogModule :: fn new() -> Self`
`AuditLogModule :: fn name(& self) -> & 'static str`
`AuditLogModule :: fn version(& self) -> & 'static str`
`AuditLogModule :: fn migrations(& self) -> Vec <MigrationSet>`
`AuditLogModule :: async fn migrate_pending(& self, pool : & PgPool) -> std::result::Result <u32, MigrationError>`

`failures (other)`

Fail-loud accounting for best-effort audit writes (Sprint 0.55 T1 / F1).

Item
`fn note_audit_write_failure(path : & str, action : & str, err : & sqlx::Error)`
`fn audit_write_failures_total() -> u64`
`fn audit_write_failures_for(path : & str, action : & str) -> u64`

`repo (other)`

Audit-log persistence over the append-only audit_logs table.

Item
`fn action_category(action : & str) -> & 'static str`
`async fn list_audit_page(pool : & PgPool, f : & AuditFilter) -> Result <AuditPage, sqlx::Error>`
`async fn distinct_actors(pool : & PgPool) -> Result <Vec <(Uuid, String)>, sqlx::Error>`
`async fn distinct_actions(pool : & PgPool) -> Result <Vec <String>, sqlx::Error>`

`AuditFilter`

Audit-log persistence over the append-only audit_logs table.

Item
`pub struct AuditFilter`
`async fn category_counts(pool : & PgPool, f : & AuditFilter,) -> Result <Vec <(String, i64)>, sqlx::Error>`

`AuditPage`

Audit-log persistence over the append-only audit_logs table.

Item
`pub struct AuditPage`

`AuditRepo`

Audit-log persistence over the append-only audit_logs table.

Item
`pub struct AuditRepo`
`AuditRepo :: async fn record <'e, E>(executor : E, log : & AuditLog) -> Result <(), sqlx::Error> where E : Executor <'e, Database = Postgres>,`
`AuditRepo :: async fn record_scoped(pool : & PgPool, log : & AuditLog) -> Result <(), sqlx::Error>`

`AuditView`

Audit-log persistence over the append-only audit_logs table.

Item
`pub struct AuditView`
`async fn list_audit(pool : & PgPool, actor_id : Option <Uuid>, action : Option <& str>, limit : i64,) -> Result <Vec <AuditView>, sqlx::Error>`

`Cursor`

Audit-log persistence over the append-only audit_logs table.

Item
`pub struct Cursor`
`Cursor :: fn encode(& self) -> String`
`Cursor :: fn decode(s : & str) -> Option <Self>`

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

application_audit_log

failures
repo

flowchart TD
  n_application_audit_log["application_audit_log"]
  n_application_audit_log --> n_failures["failures"]
  n_application_audit_log --> n_repo["repo"]

Public surface

`crate root`

Item	What it is
`pub struct AuditLogModule`	—
`AuditLogModule :: fn new() -> Self`	—
`AuditLogModule :: fn name(& self) -> & 'static str`	—
`AuditLogModule :: fn version(& self) -> & 'static str`	—
`AuditLogModule :: fn migrations(& self) -> Vec <MigrationSet>`	—
`AuditLogModule :: async fn migrate_pending(& self, pool : & PgPool) -> std::result::Result <u32, MigrationError>`	—

`failures`

Item	What it is
`fn note_audit_write_failure(path : & str, action : & str, err : & sqlx::Error)`	Record a failed best-effort audit write: bump `audit_write_failures_total{path,action}` and log at error level
`fn audit_write_failures_total() -> u64`	Headline counter: total best-effort audit-write failures since start.
`fn audit_write_failures_for(path : & str, action : & str) -> u64`	Per-label tally for one `(path, action)` pair (`0` if never failed).

`repo`

Item	What it is
`fn action_category(action : & str) -> & 'static str`	Coarse category for a log `action`, for the `/staff/logs` tabs (Sprint 0.54 lean — derived from the action string; no stored column yet)
`pub struct Cursor`	Keyset cursor over `(created_at DESC, id DESC)`
`Cursor :: fn encode(& self) -> String`	—
`Cursor :: fn decode(s : & str) -> Option <Self>`	—
`pub struct AuditFilter`	Filters for `list_audit_page`
`pub struct AuditPage`	A page of audit rows + the cursor to fetch the next (older) page.
`pub struct AuditRepo`	The single audit write path
`AuditRepo :: async fn record <'e, E>(executor : E, log : & AuditLog) -> Result <(), sqlx::Error> where E : Executor <'e, Database = Postgres>,`	Append one audit row.
`AuditRepo :: async fn record_scoped(pool : & PgPool, log : & AuditLog) -> Result <(), sqlx::Error>`	RLS-safe best-effort write (Sprint 0.55 US-0.55.8b, consensus Q4(b))
`pub struct AuditView`	One audit row, projected for the read-only `/admin/audit` view.
`async fn list_audit(pool : & PgPool, actor_id : Option <Uuid>, action : Option <& str>, limit : i64,) -> Result <Vec <AuditView>, sqlx::Error>`	Read the audit trail newest-first, optionally filtered by actor id and/or action
`async fn list_audit_page(pool : & PgPool, f : & AuditFilter) -> Result <AuditPage, sqlx::Error>`	Paginated, filtered audit read for `/staff/logs` (Sprint 0.54 T1)
`async fn category_counts(pool : & PgPool, f : & AuditFilter,) -> Result <Vec <(String, i64)>, sqlx::Error>`	Count rows per category (for the tab badges), honoring the same actor/action/ date filters but NOT the cursor.
`async fn distinct_actors(pool : & PgPool) -> Result <Vec <(Uuid, String)>, sqlx::Error>`	Distinct `(actor_id, actor_display)` pairs present in the trail — for the audit view's Actor filter.
`async fn distinct_actions(pool : & PgPool) -> Result <Vec <String>, sqlx::Error>`	Distinct action strings present in the trail — for the Action filter.

Re-exports. Exported here, defined elsewhere.

Export	Defined in
`note_audit_write_failure`	`failures::note_audit_write_failure`
`{AuditRepo,AuditView}`	`repo::{AuditRepo,AuditView}`

Boundary

Reaches into foundation, identity.

Shares tier application with 120 other crates: application-agreements, application-ai, application-analytics, application-approvals, application-assessments, application-auth, application-billing, application-browser-automation, … (120 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)	`application`
Architectural role (taxonomy)	`unclassified (baselined)`
Location	`crates/application/audit-log`
Vocabulary in force (lexicon)	`current`

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

flowchart LR
  n_application["application"] --> n_foundation["foundation"]
  n_application["application"] --> n_identity["identity"]

Dependencies

Runtime, in this workspace.

Crate	Tier	Optional	Only on
`application-core`	application	no	always
`foundation-audit-log`	foundation	no	always
`identity-tenant`	identity	no	always

Runtime, from outside the workspace.

Crate	Requirement	Features	Optional	Only on
`async-trait`	`^0.1`	—	no	always
`chrono`	`^0.4`	`serde`	no	always
`serde_json`	`^1`	—	no	always
`sqlx`	`^0.8`	`runtime-tokio`, `postgres`, `chrono`, `uuid`, `json`	no	always
`tracing`	`^0.1`	—	no	always
`uuid`	`^1`	`v4`, `v7`, `serde`, `js`	no	always

Development, from outside the workspace.

Crate	Requirement	Features	Optional	Only on
`tokio`	`^1`	`full`	no	always

Build. None.

Depended on by. 6 workspace crates.

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

flowchart LR
  n_application_auth["application-auth"] -->|uses| SELF
  n_application_cli["application-cli"] -->|uses| SELF
  n_application_cms["application-cms"] -->|uses| SELF
  n_application_dlp["application-dlp"] -->|uses| SELF
  n_application_impersonation["application-impersonation"] -->|uses| SELF
  n_application_rbac["application-rbac"] -->|uses| SELF
  SELF["application-audit-log"]
  SELF -->|runtime| n_application_core["application-core"]
  SELF -->|runtime| n_foundation_audit_log["foundation-audit-log"]
  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
lib	`application_audit_log`	`src/lib.rs`
test	`pg_forge_audit_log`	`tests/pg_forge_audit_log.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	yes
async runtime	none detected
database access	yes
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
`CARGO_PKG_VERSION`	`src/lib.rs`

6 workspace crates depend on this one: application-auth, application-cli, application-cms, application-dlp, application-impersonation, application-rbac.

Verification

Kind	Count
Unit tests	12
Integration tests	1
Examples	0
Doctests	0

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

Module	Tests	Examples	Consumers
`crate root`	1	0	0
`failures`	3	0	3
`repo`	11	0	11

What the tests establish, by name:

migrate_pending_creates_audit_logs_table — tests/pg_forge_audit_log.rs
distinct_labels_do_not_collide — src/failures.rs
labelled_counter_increments_per_failure — src/failures.rs
total_counter_moves_on_failure — src/failures.rs
test_module_migrations_non_empty — src/lib.rs
audit_filter_carries_rls_setting — src/repo.rs
category_ai — src/repo.rs
category_auth — src/repo.rs
category_content — src/repo.rs
category_job_and_other — src/repo.rs
category_security — src/repo.rs
cursor_decode_rejects_garbage — src/repo.rs
cursor_round_trips — src/repo.rs

Documentation coverage

Measure	Documented	Total
Public items with rustdoc	16	24
Public modules with a `//!` block	2	2

pie showData
    title Public items with rustdoc
    "Documented" : 16
    "No rustdoc detected" : 8

Metrics

Metric	Value
Rust source files	3
Source lines	743
Code lines	547
Public API items	24
Public modules	2
Tests	13
Examples	0
Cargo features	0
Direct runtime dependencies	9
Workspace reverse dependencies	6

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

pie showData
    title Rust source composition
    "Code" : 547
    "Blank or comment" : 196

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.

All application · Manual