foundation-refresh-policy

Provider-agnostic override -> full-scan -> incremental -> bootstrap sync-strategy decision logic

What it is for

# foundation-refresh-policy

Provider-agnostic sync-strategy decision logic: given the current state (an explicit override, a full-scan flag, and any stored cursor), decides whether the next sync should use a caller-pinned override, a full scan, resume incrementally from a cursor, or bootstrap with a default window.

Lifted (decision logic only) from rust-gmail-manager/src/services/sync_service.rs's build_sync_query — see CHANGELOG.md for the Gate 4.5 provenance note and README.md for the full design rationale.

Scope boundary: this crate does no I/O, no provider-specific fetching, and no worker/scheduling loop. It answers one question — which SyncStrategy applies next — and nothing else. The worker loop that acts on the decision lives in operations-mail-sync (sprint 3.45 crate 10).

Capabilities

policy (other)

RefreshPolicy — the override -> full scan -> incremental -> bootstrap

RefreshPolicy

RefreshPolicy — the override -> full scan -> incremental -> bootstrap

SyncStrategy

The decision output: which strategy the next sync should use.

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

foundation_refresh_policy

• policy
• strategy

flowchart TD
  n_foundation_refresh_policy["foundation_refresh_policy"]
  n_foundation_refresh_policy --> n_policy["policy"]
  n_foundation_refresh_policy --> n_strategy["strategy"]

Public surface

`policy`

`strategy`

Re-exports. Exported here, defined elsewhere.

Boundary

Depends on no other workspace tier.

Shares tier foundation with 27 other crates: foundation-audit-log, foundation-basemodels, foundation-bounded-io, foundation-conversation-closure, foundation-crypto-sign, foundation-decisioning, foundation-encounter-vocabulary, foundation-fs-metadata, … (27 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

Dependencies

Runtime, in this workspace.

Runtime, from outside the workspace.

Development, from outside the workspace.

Build. None.

Depended on by. 2 workspace crates.

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

flowchart LR
  n_operations_mail_sync["operations-mail-sync"] -->|uses| SELF
  n_tools_mail_manager["tools-mail-manager"] -->|uses| SELF
  SELF["foundation-refresh-policy"]
  SELF -->|runtime| n_foundation_mail_message["foundation-mail-message"]
  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

Error model

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

Operational characteristics

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.

Related capabilities

2 workspace crates depend on this one: operations-mail-sync, tools-mail-manager.

Verification

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

What the tests establish, by name:

• bootstrap_window_is_configurable — src/policy.rs
• default_bootstrap_window_is_thirty_days — src/policy.rs
• full_scan_has_no_filter_and_ignores_a_stored_cursor — src/policy.rs
• no_cursor_falls_back_to_bootstrap_with_default_window — src/policy.rs
• override_wins_over_everything — src/policy.rs
• stored_cursor_becomes_incremental — src/policy.rs
• sync_strategy_round_trips_through_serde — src/strategy.rs

Documentation coverage

pie showData
    title Public items with rustdoc
    "Documented" : 5
    "No rustdoc detected" : 1

Metrics

pie showData
    title Public API by kind
    "constant" : 1
    "enum" : 1
    "method" : 3
    "struct" : 1

pie showData
    title Rust source composition
    "Code" : 124
    "Blank or comment" : 88

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.