feat: structured clickable artifact links {kind,url,label} (0.27.0) (#55)

* feat(artifacts): structured clickable links {kind,url,label} for the card

Adds Artifacts.links rendered as [label](url) (kind) in the pack. Fed by:
- harvest at close: resolves repo web URL (gh repo view) and emits clickable
  PR / commit / branch links (a bare commit hash becomes a real link)
- artifact_add: new MCP tool + `task-journal artifact-add` CLI command so the
  agent can attach a doc / deploy / dashboard. Stored as a finding event whose
  meta.artifacts is merged by index_event — no new storage.

Flat token vectors unchanged (still power search / relatedness). Bump 0.27.0.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* fix(deps): bump inter-crate tj-core pin to 0.27.0

The path deps pinned task-journal-core = "0.26.1" (^0.26.1 excludes
0.27.0); the first minor bump broke registry resolution in CI. Match the
pin to the workspace version.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: Shahinyanm

CHANGELOG.md

@@ -7,6 +7,25 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.27.0] - 2026-06-17
+
+### Added
+- **Clickable, typed artifact links on the task card.** `Artifacts` gains a
+  `links: [{kind, url, label}]` field rendered in the pack as
+  `[label](url) (kind)`. Two sources feed it:
+  - **Auto at close** — the harvest now resolves the repo's web URL (`gh repo
+    view`) and emits ready-to-click links for the PR (labelled `PR #N`), the
+    commit (`…/commit/<sha>`), and the branch (`…/tree/<branch>`), so a bare
+    commit hash becomes a real link.
+  - **`artifact_add`** — a new MCP tool (and `task-journal artifact-add` CLI
+    command) lets the agent attach arbitrary references — a design doc, a
+    deploy/preview URL, a dashboard — as `artifact_add(task_id, kind, url,
+    label)`. Stored as a `finding` event whose `meta.artifacts` is merged by
+    `index_event`, so it surfaces on the card without new storage.
+
+  The flat token vectors (commit_hashes, pr_urls, …) are unchanged and still
+  power artifact search / task relatedness.
+
 ## [0.26.6] - 2026-06-17
 
 ### Added

Cargo.lock

@@ -7,7 +7,7 @@ members = [
 ]
 
 [workspace.package]
-version = "0.26.6"
+version = "0.27.0"
 edition = "2021"
 rust-version = "1.88"
 license = "MIT"

Cargo.toml

@@ -23,7 +23,7 @@ default = ["embed"]
 embed = ["tj-core/embed"]
 
 [dependencies]
-tj-core = { package = "task-journal-core", version = "0.26.1", path = "../tj-core", default-features = false }
+tj-core = { package = "task-journal-core", version = "0.27.0", path = "../tj-core", default-features = false }
 anyhow = { workspace = true }
 clap = { workspace = true }
 tracing = { workspace = true }

crates/tj-cli/Cargo.toml

@@ -727,6 +727,22 @@ enum Commands {
         #[arg(long)]
         outcome_tag: Option<String>,
     },
+    /// Attach a clickable, typed link to a task (doc, deploy, dashboard,
+    /// design, …). Renders under the pack's Artifacts as `[label](url)` so a
+    /// host like the Loom board shows it on the task card. Writes a `finding`
+    /// event carrying the link in `meta.artifacts`.
+    ArtifactAdd {
+        task_id: String,
+        /// Short tag: `doc`, `deploy`, `dashboard`, `design`, `pr`, …
+        #[arg(long)]
+        kind: String,
+        /// The link target (URL or path).
+        #[arg(long)]
+        url: String,
+        /// Human label shown on the card.
+        #[arg(long)]
+        label: String,
+    },
     /// Reopen a previously closed task (writes a `reopen` event and
     /// flips status back to `open`). Use when the same scope comes
     /// back, e.g. a regression on a shipped fix or a follow-up bug
@@ -1454,6 +1470,33 @@ fn real_main() -> Result<()> {
             writer.flush_durable()?;
             println!("{}", event.event_id);
         }
+        Commands::ArtifactAdd {
+            task_id,
+            kind,
+            url,
+            label,
+        } => {
+            let cwd = std::env::current_dir()?;
+            let project_hash = tj_core::project_hash::from_path(&cwd)?;
+            let events_path = tj_core::paths::events_dir()?.join(format!("{project_hash}.jsonl"));
+            std::fs::create_dir_all(events_path.parent().unwrap())?;
+
+            // A `finding` event carries the link in meta.artifacts; index_event
+            // merges it so it renders under the pack's Artifacts.
+            let mut event = tj_core::event::Event::new(
+                &task_id,
+                tj_core::event::EventType::Finding,
+                tj_core::event::Author::User,
+                tj_core::event::Source::Cli,
+                format!("📎 {kind}: {label} — {url}"),
+            );
+            event.meta = tj_core::artifacts::link_event_meta(&kind, &url, &label);
+
+            let mut writer = tj_core::storage::JsonlWriter::open(&events_path)?;
+            writer.append(&event)?;
+            writer.flush_durable()?;
+            println!("{}", event.event_id);
+        }
         Commands::Close {
             task_id,
             reason,

crates/tj-cli/src/main.rs

@@ -5788,3 +5788,46 @@ fn close_harvests_git_commit_and_branch_into_pack() {
         .success()
         .stdout(contains("feat/harvest-me"));
 }
+
+#[test]
+fn artifact_add_renders_clickable_link_in_pack() {
+    let dir = assert_fs::TempDir::new().unwrap();
+    let task_id = String::from_utf8(
+        Command::cargo_bin("task-journal")
+            .unwrap()
+            .env("XDG_DATA_HOME", dir.path())
+            .args(["create", "Card test"])
+            .assert()
+            .success()
+            .get_output()
+            .stdout
+            .clone(),
+    )
+    .unwrap()
+    .trim()
+    .to_string();
+
+    Command::cargo_bin("task-journal")
+        .unwrap()
+        .env("XDG_DATA_HOME", dir.path())
+        .args([
+            "artifact-add",
+            &task_id,
+            "--kind",
+            "doc",
+            "--url",
+            "https://example.com/spec.md",
+            "--label",
+            "Design spec",
+        ])
+        .assert()
+        .success();
+
+    Command::cargo_bin("task-journal")
+        .unwrap()
+        .env("XDG_DATA_HOME", dir.path())
+        .args(["pack", &task_id, "--mode", "full"])
+        .assert()
+        .success()
+        .stdout(contains("[Design spec](https://example.com/spec.md) (doc)"));
+}

crates/tj-cli/tests/cli.rs

@@ -27,6 +27,23 @@ pub struct Artifacts {
     pub files: Vec<String>,
     #[serde(default, skip_serializing_if = "Vec::is_empty")]
     pub branch_names: Vec<String>,
+    /// Clickable, typed links for rendering a task card. Additive to the flat
+    /// token vectors above (which still power artifact search / relatedness):
+    /// `links` carries a ready-to-click `{kind,url,label}` so a host like the
+    /// Loom board doesn't reconstruct URLs. Harvested at close (PR/commit/
+    /// branch) or attached by the agent via `artifact_add` (doc/deploy/…).
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    pub links: Vec<ArtifactLink>,
+}
+
+/// A typed, clickable reference. `kind` is a short tag (`pr`, `commit`,
+/// `branch`, `doc`, `deploy`, `issue`, …); `url` is the link; `label` is the
+/// human text shown on the card.
+#[derive(Debug, Default, Clone, Serialize, Deserialize, PartialEq, Eq)]
+pub struct ArtifactLink {
+    pub kind: String,
+    pub url: String,
+    pub label: String,
 }
 
 impl Artifacts {
@@ -36,6 +53,7 @@ impl Artifacts {
             && self.linked_issues.is_empty()
             && self.files.is_empty()
             && self.branch_names.is_empty()
+            && self.links.is_empty()
     }
 
     /// Merge another `Artifacts` into self, preserving insertion order
@@ -54,9 +72,27 @@ impl Artifacts {
                 }
             }
         }
+        // links hold a struct, not a String, so they merge separately —
+        // deduped by full {kind,url,label} equality.
+        for l in other.links {
+            if !self.links.iter().any(|x| x == &l) {
+                self.links.push(l);
+            }
+        }
     }
 }
 
+/// Build the `event.meta` payload that attaches one [`ArtifactLink`] to an
+/// event. `db::index_event` merges `meta["artifacts"]` into the event's
+/// artifacts, so a `Finding` (or any) event carrying this meta surfaces the
+/// link in the task's pack. Shared by the CLI `artifact-add` command and the
+/// MCP `artifact_add` tool so they store identical shapes.
+pub fn link_event_meta(kind: &str, url: &str, label: &str) -> serde_json::Value {
+    serde_json::json!({
+        "artifacts": { "links": [ { "kind": kind, "url": url, "label": label } ] }
+    })
+}
+
 /// Extract artifacts from a single piece of text (event body, prompt,
 /// tool output — anything stringly-typed). Idempotent and free of I/O.
 pub fn extract(text: &str) -> Artifacts {
@@ -252,6 +288,29 @@ mod tests {
         assert!(a.is_empty());
     }
 
+    #[test]
+    fn merge_dedupes_links_by_full_identity() {
+        let link = |k: &str, u: &str, l: &str| ArtifactLink {
+            kind: k.into(),
+            url: u.into(),
+            label: l.into(),
+        };
+        let mut a = Artifacts {
+            links: vec![link("pr", "u/pull/1", "PR #1")],
+            ..Default::default()
+        };
+        assert!(!a.is_empty());
+        a.merge(Artifacts {
+            links: vec![
+                link("pr", "u/pull/1", "PR #1"),  // dup → dropped
+                link("doc", "u/spec.md", "Spec"), // new → kept
+            ],
+            ..Default::default()
+        });
+        assert_eq!(a.links.len(), 2);
+        assert_eq!(a.links[1].kind, "doc");
+    }
+
     #[test]
     fn captures_short_pr_reference_but_not_bare_hash() {
         let a = extract("merged PR #51 and PR#52, see pull request #53");