diff --git a/fieldtests/milestone-project-environment/FINDINGS.md b/fieldtests/milestone-project-environment/FINDINGS.md
new file mode 100644
index 0000000..34eb1a1
--- /dev/null
+++ b/fieldtests/milestone-project-environment/FINDINGS.md
@@ -0,0 +1,191 @@
+# Fieldtest — milestone "Project environment — the project-as-crate authoring loop" (#180) — 2026-07-02
+
+**Status:** Draft — awaiting orchestrator triage
+**Author:** fieldtester (dispatched as the milestone-close gate)
+
+## Scope
+
+The milestone-close gate for the **project-as-crate authoring loop**: `aura new`
+scaffolds a buildable cdylib project; inside it the `aura` host discovers
+`Aura.toml`, cargo-builds + loads the project cdylib, merges the project
+vocabulary with `aura-std`, and runs blueprints with project provenance in the
+manifest; `aura graph introspect --vocabulary | --content-id | --identity-id`
+introspects the merged surface and topology ids.
+
+Run entirely from the **public interface** — `README.md`,
+`docs/project-layout.md`, `docs/glossary.md`, `docs/design/INDEX.md`
+(C13/C16/C17/C24), `aura … --help`, and the fieldtests corpus *shape*. No
+`crates/*/src` and no `crates/*/tests` were read; no rustdoc was consulted. The
+only node-authoring template available was the scaffolded `Identity` node.
+Artefact under test: `target/debug/aura`, rebuilt from HEAD via
+`cargo build -p aura-cli` before the run; the project cdylib rebuilt with
+`cargo build` in the project between edits.
+
+## Tasks
+
+All fixtures under `fieldtests/milestone-project-environment/`. The scaffolded
+project is `momentum-lab/`.
+
+### Task 1 — scaffold -> build -> run -> run-again -> provenance  — WORKS
+Commands (verbatim):
+
+    aura new momentum-lab                       # -> "created project `momentum-lab` (namespace `momentum_lab`)"
+    cd momentum-lab && cargo build              # clean
+    aura run blueprints/signal.json             # -> s1_starter_run.json
+    aura run blueprints/signal.json  (x2, diff) # byte-IDENTICAL (determinism)
+
+- The emitted crate is buildable as-is: `crate-type=["cdylib"]`, an empty
+  `[workspace]` table (so it builds under the engine tree), path-dep on
+  `aura-core`, a `CLAUDE.md`, `.gitignore`, an `Aura.toml` (`[paths] runs`), a
+  `src/lib.rs` with a worked `Identity` node registered via `aura_project!`, and
+  a starter `blueprints/signal.json` that already wires the project's own
+  `momentum_lab::Identity` node at the graph tail — so the very first run
+  exercises the merged vocabulary, not just std.
+- The run report's manifest carries the milestone's headline provenance:
+  `"project":{"namespace":"momentum_lab","dylib_sha256":"ceda123f…"}`. Two runs
+  are byte-identical (C1). Evidence: `s1_starter_run.json`.
+
+### Task 2 — author your own node (the real authoring loop)  — WORKS
+Edited `momentum-lab/src/lib.rs` to add a `Negate` (f64 sign-flip) node
+following the scaffolded `Identity` template, registered it in
+`vocabulary()`/`type_ids()`, then:
+
+    cargo build                                                  # clean
+    aura graph introspect --vocabulary                           # now lists momentum_lab::Negate
+    aura graph build < s2_negate.ops.json > s2_negate.bp.json    # resolves the project node
+    aura run s2_negate.bp.json                                   # -> s2_negate_run.json
+
+- The op-list (`s2_negate.ops.json`, canonical authoring form per README) wires
+  `price -> SMA/SMA -> Sub -> Bias -> momentum_lab::Negate`. `graph build`
+  resolved the project node and emitted a runnable blueprint (`s2_negate.bp.json`).
+- The new node visibly changed behaviour: `total_pips` went `+0.34185 -> -0.34185`
+  (exact sign flip), the R block changed accordingly, and the manifest's
+  `dylib_sha256` updated (`ceda123f… -> 70263c83…`) — proof the host loaded the
+  fresh build per invocation. Deterministic on re-run. Evidence:
+  `s2_negate_run.json`.
+
+### Task 3 — introspection: --vocabulary / --content-id / --identity-id  — WORKS
+
+    aura graph introspect --vocabulary                    # 2 project + 22 std = 24 lines
+    aura graph introspect --node momentum_lab::Negate     # in value:F64 / out value:F64
+    aura graph introspect --content-id  < s2_negate.ops.json         (A)
+    aura graph introspect --content-id  < s3_negate_renamed.ops.json (B)
+    aura graph introspect --identity-id < {A,B}
+    aura graph introspect --content-id --identity-id < A            # both, content first
+
+- `--vocabulary` lists project types first, then std alphabetically; `--node`
+  resolves a project node's ports. Renamed-twin test (A vs B = same topology,
+  different node names): content-ids differ (`bd6c70…` vs `9dc729…`),
+  identity-ids are equal (`b02fbb…`), and the combined flag prints content-id
+  first — exactly as README / the `identity id` glossary entry document.
+  Cross-check: `content-id(A)` equals the `topology_hash` stamped in
+  `s2_negate_run.json`'s manifest. Evidence: `s3_id_comparison.out`.
+
+### Task 4 — misuse paths a newcomer hits  — WORKS (one friction)
+- Charter violation (registered a non-`momentum_lab::`-prefixed type id,
+  rebuilt): refused at load, exit 1,
+  `aura: project vocabulary rejected: type id ` + "`NoNamespace`" + ` lacks the
+  project prefix ` + "`momentum_lab::`" + ` — names both sides, house-style prose.
+  Reverted after capture. Evidence: `s4_charter_violation.err`.
+- `--release` with only a debug build: exit 1, names the exact missing path + the
+  fix (`run cargo build in the project first`). Evidence: `s4_release_missing.err`.
+- Outside any project: `--vocabulary` -> std-only (22); a project blueprint is
+  refused (see Finding F5). Walk-up discovery from a nested subdir
+  (`momentum-lab/blueprints/`) correctly finds `Aura.toml` (24 entries).
+
+## Findings
+
+### [friction] F1 — `aura new` leaves a nested `.git` that snags the enclosing tree
+- Task 1. `aura new` runs `git init`; the scaffold contains `momentum-lab/.git`.
+- Correct for a real standalone project (C16: "its own git history"). But
+  `docs/project-layout.md` explicitly supports scaffolding under the engine tree
+  "before it moves to its own repo" — the exact reason the empty `[workspace]`
+  table is emitted. That handles cargo's walk-up; nothing handles git's walk-up:
+  the nested repo becomes an embedded gitlink in the enclosing repo, so
+  `git add fieldtests/…/momentum-lab` would add a submodule pointer, not the
+  files. I had to `rm -rf momentum-lab/.git` for the corpus to be committable.
+- Recommended: skip `git init` when an enclosing `.git` is detected, or document
+  the scaffold-under-a-repo wrinkle beside the `[workspace]` note.
+
+### [doc-gap] F2 — no worked example of a node that reads a bound param
+- Task 2. The only authoring template is the scaffolded `Identity` (param-less;
+  build closure `|_| Box::new(..)`). No public doc (README, project-layout,
+  ledger, --help) shows how a `PrimitiveBuilder` build closure consumes a bound
+  param — the natural next step (a tunable, sweepable node). I could author a
+  param-less node from the surface alone, but a first parametric node cannot be
+  written from the public docs without reading engine source/rustdoc.
+- Recommended: have `aura new` emit one param-bearing node in the template (or
+  document the build-closure param-read in project-layout.md). Highest-value gap.
+
+### [doc-gap] F3 — the manifest `project` provenance block is undocumented
+- Task 1. The manifest's new `"project":{namespace,dylib_sha256}` block is the
+  milestone's headline provenance, but the glossary `manifest` entry still
+  defines a manifest as "(node-commit + params + data-window + seed + broker
+  profile)" — no `project`. A consumer inspecting the JSON meets an undocumented
+  field.
+- Recommended: add `project` (namespace + dylib hash) to the glossary manifest
+  definition.
+
+### [friction] F4 — `run` leaks a raw Rust `Debug` enum for an unknown node type
+- Task 4. Same logical error, two phrasings: `graph build` (stdin) ->
+  `op 5 (add): unknown node type "momentum_lab::Negate"` (exit 1, prose);
+  `run` (argv file) ->
+  `aura: s2_negate.bp.json: UnknownNodeType("momentum_lab::Negate")`
+  (exit 2, raw Debug-formatted enum variant). The exit-code split is correct and
+  documented (C14: argv-file content = exit 2, stdin data = exit 1), but the
+  `run` path's `UnknownNodeType("…")` breaks the lowercase house style every other
+  diagnostic uses. Evidence: `s4_outside_run.err`, `s4_outside_build.err`.
+- Recommended: render the loader error on the `run` path in house-style prose
+  (e.g. `unknown node type "momentum_lab::Negate"`).
+
+### [doc-gap] F5 — "outside a project" is not distinctly diagnosed
+- Task 4. Running a project blueprint with no `Aura.toml` up-tree surfaces the
+  downstream symptom (`UnknownNodeType`), not the likely cause ("not inside a
+  project / no Aura.toml found"). A newcomer who cd'd out of their project reads
+  "unknown node type" rather than "you are not in a project".
+- Recommended: when a blueprint names a `namespace::Type` and no project was
+  discovered, hint that no `Aura.toml` was found up-tree.
+
+### [doc-gap] F6 — scaffolded `Aura.toml` omits the documented data-archive-root path
+- Task 1. Glossary/`project-layout.md` say `Aura.toml` carries "the data archive
+  root and the runs dir"; the emitted file has only `[paths] runs = "runs"`. No
+  concrete key name for the data archive root is documented or scaffolded, so a
+  newcomer wanting `aura run --real <symbol>` has no scaffolded slot to point at
+  their recorded data. Low severity for a synthetic-default v1.
+- Recommended: scaffold the data-archive-root key (commented) or drop it from the
+  Aura.toml prose until a consumer reads it.
+
+### [working] W1 — the merged-vocabulary authoring loop is real and clean
+- Tasks 1-3. Edit lib.rs -> `cargo build` -> the next `aura` invocation loads the
+  fresh dylib (manifest `dylib_sha256` tracks the rebuild), merges 2 project + 22
+  std types, resolves the project node in `graph build`, `run`, and every
+  `introspect` mode, and produces deterministic runs. Walk-up `Aura.toml`
+  discovery works from nested subdirs. The whole authoring loop the milestone
+  promises works end-to-end from the public docs.
+
+### [working] W2 — id semantics and diagnostics are precise
+- Tasks 3-4. `--content-id`/`--identity-id` behave exactly as documented
+  (name-blind identity id equal across renamed twins; byte-exact content id
+  differs; combinable, content-first; content-id == manifest `topology_hash`).
+  The charter refusal and the `--release`-missing message are both clear,
+  exit-code-correct, and actionable. One micro-nit inside W2's otherwise-great
+  `--release` message: it says "or pass --release …" even when `--release` was
+  already passed (the generic hint doesn't adapt to the current mode).
+
+## Milestone verdict: GREEN
+
+A downstream consumer can run the entire project-as-crate authoring loop —
+`aura new` -> `cargo build` -> run (deterministic, with project provenance) ->
+author a real node -> rebuild -> introspect the merged vocabulary -> topology ids
+— from the public docs alone, with zero behavioural bugs. All six findings are
+friction/doc-gap polish, not loop blockers:
+
+| Finding | Class | Recommended action |
+|---|---|---|
+| F1 nested `.git` snags enclosing tree | friction | plan (skip git-init under a repo, or document) |
+| F2 no param-node authoring example | doc-gap | plan (scaffold a param node) — highest-value gap |
+| F3 manifest `project` block undocumented | doc-gap | tighten glossary |
+| F4 `run` leaks Debug enum on unknown type | friction | plan (house-style the loader error) |
+| F5 "outside a project" not distinctly diagnosed | doc-gap | plan (hint on missing Aura.toml) |
+| F6 Aura.toml data-archive-root un-scaffolded/undocumented | doc-gap | tighten docs |
+| W1/W2 loop + id semantics correct | working | carry-on |
diff --git a/fieldtests/milestone-project-environment/momentum-lab/.gitignore b/fieldtests/milestone-project-environment/momentum-lab/.gitignore
new file mode 100644
index 0000000..af5cf3d
--- /dev/null
+++ b/fieldtests/milestone-project-environment/momentum-lab/.gitignore
@@ -0,0 +1,3 @@
+/target
+Cargo.lock
+/runs
diff --git a/fieldtests/milestone-project-environment/momentum-lab/Aura.toml b/fieldtests/milestone-project-environment/momentum-lab/Aura.toml
new file mode 100644
index 0000000..af335c1
--- /dev/null
+++ b/fieldtests/milestone-project-environment/momentum-lab/Aura.toml
@@ -0,0 +1,3 @@
+# Static project context only (C17); paths only.
+[paths]
+runs = "runs"
diff --git a/fieldtests/milestone-project-environment/momentum-lab/CLAUDE.md b/fieldtests/milestone-project-environment/momentum-lab/CLAUDE.md
new file mode 100644
index 0000000..f154dcf
--- /dev/null
+++ b/fieldtests/milestone-project-environment/momentum-lab/CLAUDE.md
@@ -0,0 +1,10 @@
+# momentum-lab — an aura research project
+
+This crate is an aura project: a cdylib of node/strategy blueprints the
+`aura` host loads during research (see the engine's docs/project-layout.md).
+
+- Build: `cargo build` (the next `aura` invocation loads the fresh dylib)
+- Run:   `aura run blueprints/signal.json` (from anywhere inside this dir)
+- Nodes live in `src/`; each is registered in `vocabulary()`/`type_ids()`
+  under the `momentum_lab::` namespace prefix.
+- Topology is data (`blueprints/*.json`), node logic is Rust.
diff --git a/fieldtests/milestone-project-environment/momentum-lab/Cargo.toml b/fieldtests/milestone-project-environment/momentum-lab/Cargo.toml
new file mode 100644
index 0000000..bdfaaf4
--- /dev/null
+++ b/fieldtests/milestone-project-environment/momentum-lab/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "momentum-lab"
+version = "0.1.0"
+edition = "2024"
+publish = false
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+aura-core = { path = "/home/brummel/dev/aura/crates/aura-core" }
+
+# Standalone workspace root: never a member of an enclosing workspace.
+[workspace]
diff --git a/fieldtests/milestone-project-environment/momentum-lab/blueprints/signal.json b/fieldtests/milestone-project-environment/momentum-lab/blueprints/signal.json
new file mode 100644
index 0000000..7291f03
--- /dev/null
+++ b/fieldtests/milestone-project-environment/momentum-lab/blueprints/signal.json
@@ -0,0 +1 @@
+{"format_version":1,"blueprint":{"name":"momentum_lab_signal","nodes":[{"primitive":{"type":"SMA","name":"fast","bound":[{"pos":0,"name":"length","kind":"I64","value":{"I64":2}}]}},{"primitive":{"type":"SMA","name":"slow","bound":[{"pos":0,"name":"length","kind":"I64","value":{"I64":4}}]}},{"primitive":{"type":"Sub"}},{"primitive":{"type":"Bias","name":"bias","bound":[{"pos":0,"name":"scale","kind":"F64","value":{"F64":0.5}}]}},{"primitive":{"type":"momentum_lab::Identity"}}],"edges":[{"from":0,"to":2,"slot":0,"from_field":0},{"from":1,"to":2,"slot":1,"from_field":0},{"from":2,"to":3,"slot":0,"from_field":0},{"from":3,"to":4,"slot":0,"from_field":0}],"input_roles":[{"name":"price","targets":[{"node":0,"slot":0},{"node":1,"slot":0}],"source":"F64"}],"output":[{"node":4,"field":0,"name":"bias"}]}}
\ No newline at end of file
diff --git a/fieldtests/milestone-project-environment/momentum-lab/src/lib.rs b/fieldtests/milestone-project-environment/momentum-lab/src/lib.rs
new file mode 100644
index 0000000..08aa32e
--- /dev/null
+++ b/fieldtests/milestone-project-environment/momentum-lab/src/lib.rs
@@ -0,0 +1,127 @@
+//! momentum-lab — an aura research project: node logic + the exported vocabulary.
+//!
+//! Every node type this crate provides is registered in `vocabulary()` /
+//! `type_ids()` under the `momentum_lab::` namespace prefix; the `aura` host loads
+//! this cdylib per invocation and merges it with the std vocabulary.
+
+use aura_core::{
+    Cell, Ctx, FieldSpec, Firing, Node, NodeSchema, PortSpec, PrimitiveBuilder,
+    ScalarKind,
+};
+
+/// One-input f64 pass-through. Emits `None` until its input has a value.
+pub struct Identity {
+    out: [Cell; 1],
+}
+
+impl Identity {
+    pub fn new() -> Self {
+        Self { out: [Cell::from_f64(0.0)] }
+    }
+    pub fn builder() -> PrimitiveBuilder {
+        PrimitiveBuilder::new(
+            "momentum_lab::Identity",
+            NodeSchema {
+                inputs: vec![PortSpec {
+                    kind: ScalarKind::F64,
+                    firing: Firing::Any,
+                    name: "value".into(),
+                }],
+                output: vec![FieldSpec { name: "value".into(), kind: ScalarKind::F64 }],
+                params: vec![],
+            },
+            |_| Box::new(Identity::new()),
+        )
+    }
+}
+
+impl Default for Identity {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl Node for Identity {
+    fn lookbacks(&self) -> Vec<usize> {
+        vec![1]
+    }
+    fn eval(&mut self, ctx: Ctx<'_>) -> Option<&[Cell]> {
+        let w = ctx.f64_in(0);
+        if w.is_empty() {
+            return None;
+        }
+        self.out[0] = Cell::from_f64(w[0]);
+        Some(&self.out)
+    }
+    fn label(&self) -> String {
+        "momentum_lab::Identity".to_string()
+    }
+}
+
+/// One-input f64 sign-flip. Emits `-value` (so a downstream consumer can invert a
+/// bias). Authored by the fieldtester as the "author your own node" step.
+pub struct Negate {
+    out: [Cell; 1],
+}
+
+impl Negate {
+    pub fn new() -> Self {
+        Self { out: [Cell::from_f64(0.0)] }
+    }
+    pub fn builder() -> PrimitiveBuilder {
+        PrimitiveBuilder::new(
+            "momentum_lab::Negate",
+            NodeSchema {
+                inputs: vec![PortSpec {
+                    kind: ScalarKind::F64,
+                    firing: Firing::Any,
+                    name: "value".into(),
+                }],
+                output: vec![FieldSpec { name: "value".into(), kind: ScalarKind::F64 }],
+                params: vec![],
+            },
+            |_| Box::new(Negate::new()),
+        )
+    }
+}
+
+impl Default for Negate {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl Node for Negate {
+    fn lookbacks(&self) -> Vec<usize> {
+        vec![1]
+    }
+    fn eval(&mut self, ctx: Ctx<'_>) -> Option<&[Cell]> {
+        let w = ctx.f64_in(0);
+        if w.is_empty() {
+            return None;
+        }
+        self.out[0] = Cell::from_f64(-w[0]);
+        Some(&self.out)
+    }
+    fn label(&self) -> String {
+        "momentum_lab::Negate".to_string()
+    }
+}
+
+fn vocabulary(type_id: &str) -> Option<PrimitiveBuilder> {
+    match type_id {
+        "momentum_lab::Identity" => Some(Identity::builder()),
+        "momentum_lab::Negate" => Some(Negate::builder()),
+        _ => None,
+    }
+}
+
+fn type_ids() -> &'static [&'static str] {
+    &["momentum_lab::Identity", "momentum_lab::Negate"]
+}
+
+aura_core::aura_project! {
+    namespace: "momentum_lab",
+    vocabulary: vocabulary,
+    type_ids: type_ids,
+}
diff --git a/fieldtests/milestone-project-environment/s1_starter_run.json b/fieldtests/milestone-project-environment/s1_starter_run.json
new file mode 100644
index 0000000..4dd0882
--- /dev/null
+++ b/fieldtests/milestone-project-environment/s1_starter_run.json
@@ -0,0 +1 @@
+{"manifest":{"commit":"81ac6fd6546da3ba409dd16756043991a43bf702","params":[],"window":[1,18],"seed":0,"broker":"sim-optimal+risk-executor(pip_size=0.0001)","topology_hash":"2a07e310004912835c6743cb646e212074e49c13796b549e46025b7b1513c4b1","project":{"namespace":"momentum_lab","dylib_sha256":"ceda123f75659acdf5ffe6e47a4ffe693068ec48bae5c197a84ec4d15acc8f42"}},"metrics":{"total_pips":0.34185000000002036,"max_drawdown":0.11139999999998655,"bias_sign_flips":2,"r":{"expectancy_r":1.2710005136982836,"n_trades":3,"win_rate":1.0,"avg_win_r":1.2710005136982836,"avg_loss_r":0.0,"profit_factor":0.0,"max_r_drawdown":0.0,"n_open_at_end":1,"sqn":3.141496526818299,"sqn_normalized":3.141496526818299,"net_expectancy_r":1.2710005136982836,"conviction_terciles_r":[0.9285858482198718,2.0771328641652427,0.8072828287097363]}}}
diff --git a/fieldtests/milestone-project-environment/s2_negate.bp.json b/fieldtests/milestone-project-environment/s2_negate.bp.json
new file mode 100644
index 0000000..15febfd
--- /dev/null
+++ b/fieldtests/milestone-project-environment/s2_negate.bp.json
@@ -0,0 +1 @@
+{"format_version":1,"blueprint":{"name":"graph","nodes":[{"primitive":{"type":"SMA","name":"fast","bound":[{"pos":0,"name":"length","kind":"I64","value":{"I64":2}}]}},{"primitive":{"type":"SMA","name":"slow","bound":[{"pos":0,"name":"length","kind":"I64","value":{"I64":4}}]}},{"primitive":{"type":"Sub","name":"sub"}},{"primitive":{"type":"Bias","name":"bias","bound":[{"pos":0,"name":"scale","kind":"F64","value":{"F64":0.5}}]}},{"primitive":{"type":"momentum_lab::Negate","name":"neg"}}],"edges":[{"from":0,"to":2,"slot":0,"from_field":0},{"from":1,"to":2,"slot":1,"from_field":0},{"from":2,"to":3,"slot":0,"from_field":0},{"from":3,"to":4,"slot":0,"from_field":0}],"input_roles":[{"name":"price","targets":[{"node":0,"slot":0},{"node":1,"slot":0}],"source":"F64"}],"output":[{"node":4,"field":0,"name":"bias"}]}}
\ No newline at end of file
diff --git a/fieldtests/milestone-project-environment/s2_negate.ops.json b/fieldtests/milestone-project-environment/s2_negate.ops.json
new file mode 100644
index 0000000..b72c861
--- /dev/null
+++ b/fieldtests/milestone-project-environment/s2_negate.ops.json
@@ -0,0 +1,14 @@
+[
+  {"op":"source","role":"price","kind":"F64"},
+  {"op":"add","type":"SMA","name":"fast","bind":{"length":{"I64":2}}},
+  {"op":"add","type":"SMA","name":"slow","bind":{"length":{"I64":4}}},
+  {"op":"add","type":"Sub"},
+  {"op":"add","type":"Bias","name":"bias","bind":{"scale":{"F64":0.5}}},
+  {"op":"add","type":"momentum_lab::Negate","name":"neg"},
+  {"op":"feed","role":"price","into":["fast.series","slow.series"]},
+  {"op":"connect","from":"fast.value","to":"sub.lhs"},
+  {"op":"connect","from":"slow.value","to":"sub.rhs"},
+  {"op":"connect","from":"sub.value","to":"bias.signal"},
+  {"op":"connect","from":"bias.bias","to":"neg.value"},
+  {"op":"expose","from":"neg.value","as":"bias"}
+]
diff --git a/fieldtests/milestone-project-environment/s2_negate_run.json b/fieldtests/milestone-project-environment/s2_negate_run.json
new file mode 100644
index 0000000..3752704
--- /dev/null
+++ b/fieldtests/milestone-project-environment/s2_negate_run.json
@@ -0,0 +1 @@
+{"manifest":{"commit":"81ac6fd6546da3ba409dd16756043991a43bf702","params":[],"window":[1,18],"seed":0,"broker":"sim-optimal+risk-executor(pip_size=0.0001)","topology_hash":"bd6c70058763140710f268ae5bda6ed8626264213a015686af585a881ae374e8","project":{"namespace":"momentum_lab","dylib_sha256":"70263c832da8457610cfe2fc468f5e7f2a4f156ac29d7be94ca84c3198397e9f"}},"metrics":{"total_pips":-0.34185000000002036,"max_drawdown":0.35860000000001946,"bias_sign_flips":2,"r":{"expectancy_r":-0.6923332538389896,"n_trades":6,"win_rate":0.3333333333333333,"avg_win_r":0.43461244377203523,"avg_loss_r":-1.255806102644502,"profit_factor":0.17304122143411294,"max_r_drawdown":2.8895544571408776,"n_open_at_end":1,"sqn":-1.7371867479561276,"sqn_normalized":-1.7371867479561276,"net_expectancy_r":-0.6923332538389896,"conviction_terciles_r":[-1.3021610224768563,-1.2094511828121481,0.43461244377203523]}}}
diff --git a/fieldtests/milestone-project-environment/s3_id_comparison.out b/fieldtests/milestone-project-environment/s3_id_comparison.out
new file mode 100644
index 0000000..e579a0b
--- /dev/null
+++ b/fieldtests/milestone-project-environment/s3_id_comparison.out
@@ -0,0 +1,16 @@
+# Scenario 3 — content-id / identity-id across renamed twins (from inside the project)
+## A = s2_negate.ops.json (names: fast/slow/sub/bias/neg)
+content-id  A: bd6c70058763140710f268ae5bda6ed8626264213a015686af585a881ae374e8
+
+identity-id A: b02fbb682085cea7cf91c38f4a2e6367a8b4b00b1bb158cba5d1cf48a9252733
+
+## B = s3_negate_renamed.ops.json (names: sma_fast/sma_slow/diff/b/inv)
+content-id  B: 9dc729978b4ddd8da31864a76147bbdb68f6224deab4ab74b84da09931dc0dd6
+
+identity-id B: b02fbb682085cea7cf91c38f4a2e6367a8b4b00b1bb158cba5d1cf48a9252733
+
+## combined (content-id --identity-id, A) — content first:
+bd6c70058763140710f268ae5bda6ed8626264213a015686af585a881ae374e8
+b02fbb682085cea7cf91c38f4a2e6367a8b4b00b1bb158cba5d1cf48a9252733
+## cross-check: content-id(A) vs run-manifest topology_hash(A):
+manifest topology_hash: "topology_hash":"bd6c70058763140710f268ae5bda6ed8626264213a015686af585a881ae374e8"
diff --git a/fieldtests/milestone-project-environment/s3_negate_renamed.ops.json b/fieldtests/milestone-project-environment/s3_negate_renamed.ops.json
new file mode 100644
index 0000000..7c8b00c
--- /dev/null
+++ b/fieldtests/milestone-project-environment/s3_negate_renamed.ops.json
@@ -0,0 +1,14 @@
+[
+  {"op":"source","role":"price","kind":"F64"},
+  {"op":"add","type":"SMA","name":"sma_fast","bind":{"length":{"I64":2}}},
+  {"op":"add","type":"SMA","name":"sma_slow","bind":{"length":{"I64":4}}},
+  {"op":"add","type":"Sub","name":"diff"},
+  {"op":"add","type":"Bias","name":"b","bind":{"scale":{"F64":0.5}}},
+  {"op":"add","type":"momentum_lab::Negate","name":"inv"},
+  {"op":"feed","role":"price","into":["sma_fast.series","sma_slow.series"]},
+  {"op":"connect","from":"sma_fast.value","to":"diff.lhs"},
+  {"op":"connect","from":"sma_slow.value","to":"diff.rhs"},
+  {"op":"connect","from":"diff.value","to":"b.signal"},
+  {"op":"connect","from":"b.bias","to":"inv.value"},
+  {"op":"expose","from":"inv.value","as":"bias"}
+]
diff --git a/fieldtests/milestone-project-environment/s4_charter_violation.err b/fieldtests/milestone-project-environment/s4_charter_violation.err
new file mode 100644
index 0000000..0dda0b6
--- /dev/null
+++ b/fieldtests/milestone-project-environment/s4_charter_violation.err
@@ -0,0 +1 @@
+aura: project vocabulary rejected: type id `NoNamespace` lacks the project prefix `momentum_lab::`
diff --git a/fieldtests/milestone-project-environment/s4_outside_build.err b/fieldtests/milestone-project-environment/s4_outside_build.err
new file mode 100644
index 0000000..0e5fa38
--- /dev/null
+++ b/fieldtests/milestone-project-environment/s4_outside_build.err
@@ -0,0 +1 @@
+aura: op 5 (add): unknown node type "momentum_lab::Negate"
diff --git a/fieldtests/milestone-project-environment/s4_outside_run.err b/fieldtests/milestone-project-environment/s4_outside_run.err
new file mode 100644
index 0000000..61a229f
--- /dev/null
+++ b/fieldtests/milestone-project-environment/s4_outside_run.err
@@ -0,0 +1 @@
+aura: s2_negate.bp.json: UnknownNodeType("momentum_lab::Negate")
diff --git a/fieldtests/milestone-project-environment/s4_release_missing.err b/fieldtests/milestone-project-environment/s4_release_missing.err
new file mode 100644
index 0000000..654b6fd
--- /dev/null
+++ b/fieldtests/milestone-project-environment/s4_release_missing.err
@@ -0,0 +1 @@
+aura: project dylib not found at /home/brummel/dev/aura/fieldtests/milestone-project-environment/momentum-lab/target/release/libmomentum_lab.so — run `cargo build` in the project first (or pass --release to load the release build)