vdavez · Sep 23, 2026 · Sep 23, 2026
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -11,6 +11,8 @@ This project follows [Semantic Versioning](https://semver.org/).
 
 #### Added
 
+- **`naics_code` on `ListProtestsOptions`.** Filters protests by the NAICS code at issue, which only SBA OHA size and NAICS appeals carry; GAO and COFC records never match it.
+
 - **`attachments(extracted_text)` — SLED document bodies on the Small plan and above** (Tango API 4.25.1; parity with tango-python, tango-node and tango-go). This SDK returns `Record`, so the leaf needs no type change — what it needed was saying so. Documented on `get_sled_opportunity`, on `SHAPE_SLED_OPPORTUNITIES_COMPREHENSIVE` and in `docs/API_REFERENCE.md`: the leaf must be **named** (no `SHAPE_SLED_*` constant includes it, and `attachments(*)` does not carry it, because the API resolves the body only for a caller who asked); the **key is absent rather than null** when the text is not being served; and a **contested document never returns text at any plan**. `suggested_shapes_do_not_name_the_paid_document_body` pins the constants. Searching document text stays ungated on every plan and returns no fragment of it.
 
 - **State, local and education (SLED) procurement** (Tango API 4.25.0; parity with tango-python, tango-node and tango-go). `resources/sled.rs` adds `list_sled_opportunities` / `get_sled_opportunity`, `list_sled_opportunity_revisions`, `get_sled_coverage`, `list_sled_forecasts` / `get_sled_forecast`, plus `iterate_sled_opportunities` and `iterate_sled_forecasts`. Four `bon`-derived options builders (`ListSledOpportunitiesOptions`, `ListSledOpportunityRevisionsOptions`, `ListSledForecastsOptions`, `GetSledOptions`) name every one of the API's 27 solicitation filters and 13 forecast filters, and five `SHAPE_SLED_*` constants land in `shapes.rs`.
@@ -21,6 +23,15 @@ This project follows [Semantic Versioning](https://semver.org/).
 
   `SHAPE_SLED_REVISIONS_MINIMAL` omits `changes` on purpose: the per-field before/after needs a Small plan, so naming it in a suggested shape would 403 a Free caller. `changed_fields` is in the shape and available at every plan.
 
+#### Changed
+
+- **`SHAPE_SLED_OPPORTUNITIES_MINIMAL` and `SHAPE_SLED_OPPORTUNITIES_COMPREHENSIVE` now include `delisted_at`**, matching the API's own default shapes. It is when the portal stopped listing a solicitation before its deadline, and it is what `status_reason = "delisted"` refers to.
+
+#### Fixed
+
+- **Protest enum values are documented in the casing the API returns.** `source_system` is lowercase (`gao`, `cofc`, `sba_oha`) and `outcome` is title-case (`Sustained`, `Denied`, …), not `"GAO"` / `"sustained"` as the rustdoc on `ListProtestsOptions` and `ProtestRecord` previously said. Filters were always case-insensitive, but code comparing returned values against the old examples would miss every match. The protests docs now also name SBA OHA as a source and list its extra outcomes (`Granted`, `Remanded`, `Reversed`, `Vacated`).
+- The `ListProtestsOptions::agency` rustdoc now describes what the filter accepts: a name, abbreviation or code, with `|` for multiple values.
+
 #### Documentation
 
 - New **State & Local — SLED** section in `docs/API_REFERENCE.md` covering all six methods and both defaults that surprise people.

diff --git a/crates/tango/src/models/protest.rs b/crates/tango/src/models/protest.rs
@@ -23,11 +23,11 @@ pub struct ProtestRecord {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub title: Option<String>,
 
-    /// Source system (`"GAO"`, `"COFC"`, etc.).
+    /// Source system: `"gao"`, `"cofc"` or `"sba_oha"` (lowercase).
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub source_system: Option<String>,
 
-    /// Outcome label (`"sustained"`, `"denied"`, …).
+    /// Outcome: `"Denied"`, `"Dismissed"`, `"Withdrawn"` or `"Sustained"`; SBA OHA adds `"Granted"`, `"Remanded"`, `"Reversed"` and `"Vacated"`. `None` while a case is pending.
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub outcome: Option<String>,
 

diff --git a/crates/tango/src/resources/protests.rs b/crates/tango/src/resources/protests.rs
@@ -1,5 +1,4 @@
-//! `GET /api/protests/` — bid-protest records from GAO and the U.S. Court of
-//! Federal Claims.
+//! `GET /api/protests/` — bid-protest records from GAO, the U.S. Court of Federal Claims (COFC), and the SBA Office of Hearings and Appeals (SBA OHA).
 
 use crate::client::Client;
 use crate::error::{Error, Result};
@@ -41,16 +40,20 @@ pub struct ListProtestsOptions {
     #[builder(default)]
     pub flat_lists: bool,
 
-    /// Source system filter (`"GAO"` or `"COFC"`).
+    /// Source system filter: `"gao"`, `"cofc"` or `"sba_oha"`.
+    ///
+    /// The API returns these lowercase; the filter itself is case-insensitive.
     #[builder(into)]
     pub source_system: Option<String>,
-    /// Outcome label (`"sustained"`, `"denied"`, …).
+    /// Outcome filter: `"Denied"`, `"Dismissed"`, `"Withdrawn"` or `"Sustained"`; SBA OHA adds `"Granted"`, `"Remanded"`, `"Reversed"` and `"Vacated"`.
+    ///
+    /// The API returns these title-case; the filter itself is case-insensitive.
     #[builder(into)]
     pub outcome: Option<String>,
     /// Case type filter.
     #[builder(into)]
     pub case_type: Option<String>,
-    /// Agency filter (CGAC code or name, depending on source system).
+    /// Agency filter: a name, abbreviation, or code (CGAC, FPDS, AAC). Multi-value OR via `|`.
     #[builder(into)]
     pub agency: Option<String>,
     /// Source-system case number filter.
@@ -59,6 +62,9 @@ pub struct ListProtestsOptions {
     /// Solicitation number filter.
     #[builder(into)]
     pub solicitation_number: Option<String>,
+    /// NAICS code at issue. Only SBA OHA size and NAICS appeals carry one, so GAO and COFC records never match.
+    #[builder(into)]
+    pub naics_code: Option<String>,
     /// Protester name filter.
     #[builder(into)]
     pub protester: Option<String>,
@@ -106,6 +112,7 @@ impl ListProtestsOptions {
             "solicitation_number",
             self.solicitation_number.as_deref(),
         );
+        push_opt(&mut q, "naics_code", self.naics_code.as_deref());
         push_opt(&mut q, "protester", self.protester.as_deref());
         push_opt(&mut q, "search", self.search.as_deref());
         push_opt(&mut q, "filed_date_after", self.filed_date_after.as_deref());
@@ -215,8 +222,8 @@ mod tests {
     #[test]
     fn list_protests_all_filters_emit() {
         let opts = ListProtestsOptions::builder()
-            .source_system("GAO")
-            .outcome("sustained")
+            .source_system("gao")
+            .outcome("Sustained")
             .case_type("Bid Protest")
             .agency("9700")
             .case_number("B-12345.1")
@@ -229,8 +236,8 @@ mod tests {
             .decision_date_before("2024-12-31")
             .build();
         let q = opts.to_query();
-        assert_eq!(get_q(&q, "source_system").as_deref(), Some("GAO"));
-        assert_eq!(get_q(&q, "outcome").as_deref(), Some("sustained"));
+        assert_eq!(get_q(&q, "source_system").as_deref(), Some("gao"));
+        assert_eq!(get_q(&q, "outcome").as_deref(), Some("Sustained"));
         assert_eq!(get_q(&q, "case_type").as_deref(), Some("Bid Protest"));
         assert_eq!(get_q(&q, "agency").as_deref(), Some("9700"));
         assert_eq!(get_q(&q, "case_number").as_deref(), Some("B-12345.1"));
@@ -252,6 +259,13 @@ mod tests {
         );
     }
 
+    #[test]
+    fn list_protests_naics_code_emits() {
+        let opts = ListProtestsOptions::builder().naics_code("541512").build();
+        let q = opts.to_query();
+        assert_eq!(get_q(&q, "naics_code").as_deref(), Some("541512"));
+    }
+
     #[test]
     fn list_protests_zero_value_omitted() {
         let opts = ListProtestsOptions::builder().build();
@@ -312,8 +326,8 @@ mod tests {
             "case_id": "b-12345-1",
             "case_number": "B-12345.1",
             "title": "Acme Corp Protest",
-            "source_system": "GAO",
-            "outcome": "sustained",
+            "source_system": "gao",
+            "outcome": "Sustained",
             "filed_date": "2024-01-15",
             "decision_date": "2024-04-20",
             "agency": {"code": "9700", "name": "DoD"},
@@ -323,8 +337,8 @@ mod tests {
         assert_eq!(rec.case_id.as_deref(), Some("b-12345-1"));
         assert_eq!(rec.case_number.as_deref(), Some("B-12345.1"));
         assert_eq!(rec.title.as_deref(), Some("Acme Corp Protest"));
-        assert_eq!(rec.source_system.as_deref(), Some("GAO"));
-        assert_eq!(rec.outcome.as_deref(), Some("sustained"));
+        assert_eq!(rec.source_system.as_deref(), Some("gao"));
+        assert_eq!(rec.outcome.as_deref(), Some("Sustained"));
         assert_eq!(rec.filed_date.as_deref(), Some("2024-01-15"));
         assert_eq!(rec.decision_date.as_deref(), Some("2024-04-20"));
         // Unknown / not-first-classed fields land in `extra` via #[serde(flatten)].

diff --git a/crates/tango/src/resources/sled.rs b/crates/tango/src/resources/sled.rs
@@ -848,6 +848,26 @@ mod tests {
         }
     }
 
+    /// The API's list and detail default shapes both carry `delisted_at`, the field that explains `status_reason = "delisted"`.
+    #[test]
+    fn suggested_opportunity_shapes_carry_delisted_at() {
+        for (name, shape) in [
+            (
+                "SHAPE_SLED_OPPORTUNITIES_MINIMAL",
+                crate::SHAPE_SLED_OPPORTUNITIES_MINIMAL,
+            ),
+            (
+                "SHAPE_SLED_OPPORTUNITIES_COMPREHENSIVE",
+                crate::SHAPE_SLED_OPPORTUNITIES_COMPREHENSIVE,
+            ),
+        ] {
+            assert!(
+                shape.split(',').any(|f| f == "delisted_at"),
+                "{name} should carry `delisted_at`: {shape}"
+            );
+        }
+    }
+
     #[test]
     fn list_sled_forecasts_filters_emit() {
         let opts = ListSledForecastsOptions::builder()

diff --git a/crates/tango/src/shapes.rs b/crates/tango/src/shapes.rs
@@ -141,9 +141,11 @@ pub const SHAPE_ITDASHBOARD_INVESTMENTS_COMPREHENSIVE: &str = concat!(
 /// `description` is detail-only on the API — its median is around 550
 /// characters and its tail runs past 120,000 — so it is deliberately absent
 /// here. Name it explicitly, or pass `verbose=true` via `extra`.
+///
+/// `delisted_at` is when the portal stopped listing the solicitation before its deadline; when set, `status` is `closed` and `status_reason` is `delisted`, unless the portal itself already called it closed, awarded or cancelled. It is null for a solicitation never delisted, or seen again since.
 pub const SHAPE_SLED_OPPORTUNITIES_MINIMAL: &str = concat!(
     "opportunity_id,solicitation_number,solicitation_type,title,state,",
-    "jurisdiction,agency,status,status_reason,posted_date,response_deadline,",
+    "jurisdiction,agency,status,status_reason,delisted_at,posted_date,response_deadline,",
     "source_url,has_documents,first_seen_at,last_change_seen_at",
 );
 
@@ -161,7 +163,7 @@ pub const SHAPE_SLED_OPPORTUNITIES_MINIMAL: &str = concat!(
 pub const SHAPE_SLED_OPPORTUNITIES_COMPREHENSIVE: &str = concat!(
     "opportunity_id,solicitation_number,solicitation_type,",
     "solicitation_type_source,title,description,state,jurisdiction,agency,",
-    "status,status_reason,status_computed_at,source_status,source_url,",
+    "status,status_reason,delisted_at,status_computed_at,source_status,source_url,",
     "posted_date,response_deadline,response_deadline_original,",
     "bid_opening_date,bid_opening_raw,category_codes,has_documents,",
     "first_seen_at,last_seen_at,last_change_seen_at,",

diff --git a/docs/API_REFERENCE.md b/docs/API_REFERENCE.md
@@ -124,6 +124,8 @@ Options: `ListGsaElibraryContractsOptions`, `GetGsaElibraryContractOptions`.
 | `list_protests(opts)` / `iterate_protests(opts)` | `GET /api/protests/` | `Page<Record>` / `PageStream<Record>` |
 | `get_protest(case_id, opts)` | `GET /api/protests/{case_id}/` | **`ProtestRecord`** (typed) |
 
+Records come from GAO, the U.S. Court of Federal Claims and the SBA Office of Hearings and Appeals. `source_system` is returned lowercase (`gao`, `cofc`, `sba_oha`) and `outcome` title-case (`Denied`, `Dismissed`, `Withdrawn`, `Sustained`; SBA OHA adds `Granted`, `Remanded`, `Reversed`, `Vacated`). Both filters are case-insensitive, but compare returned values in the API's casing. `naics_code` matches the NAICS code at issue in an SBA OHA size or NAICS appeal; GAO and COFC records carry none.
+
 Options: `ListProtestsOptions`, `GetProtestOptions`. No `ordering` (server rejects it for this resource).
 
 ### State & Local — SLED (`sled.rs`) — **Beta**
@@ -147,7 +149,7 @@ Options: `ListSledOpportunitiesOptions`, `ListSledOpportunityRevisionsOptions`,
 
 `list_sled_opportunities` deliberately does **not** synthesize `status=open` client-side: doing so would make `active = Some(false)` unreachable, since `active=false` is the complement of open rather than an independent value. `active`, `has_documents` and `source_declared` are `Option<bool>` for the same reason — `false` has to be distinguishable from unset.
 
-**`status` is Tango's answer, not the portal's.** Derived from the portal's word, the deadline and the clock, and refreshed every fifteen minutes. The portal's own word is served as `source_status`, is frozen at last capture, and is **not** filterable — most of what it calls open already has a passed deadline.
+**`status` is Tango's answer, not the portal's.** Derived from the portal's word, the delisting, the deadline and the clock, and refreshed every fifteen minutes. A solicitation the portal stopped listing before its deadline carries `delisted_at`, reads `status = "closed"` and `status_reason = "delisted"` (a portal's own closed, awarded or cancelled still takes precedence); both suggested opportunity shapes include `delisted_at`. The portal's own word is served as `source_status`, is frozen at last capture, and is **not** filterable — most of what it calls open already has a passed deadline.
 
 **Category scheme tagging is mid-migration**, so `naics` matches only the small tagged share. Use `category_code` to match a code under any scheme, including the untagged pre-migration strings.