diff --git a/fieldtests/cycle-0088-construction-op-script/FINDINGS.md b/fieldtests/cycle-0088-construction-op-script/FINDINGS.md
new file mode 100644
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+++ b/fieldtests/cycle-0088-construction-op-script/FINDINGS.md
@@ -0,0 +1,205 @@
+# Fieldtest — cycle 0088 (construction op-script service, #157) — 2026-06-29
+
+**Status:** Triaged 2026-06-29 — filed to the forward queue (see Triage outcome)
+**Author:** fieldtester (dispatched by fieldtest skill); triaged by orchestrator
+
+## Scope
+Cycle 0088 shipped the **construction op-script service** (#157, C24): two CLI
+subcommands over a declarative JSON op-list. `aura graph build` reads an op-list
+from stdin, replays it op-by-op through the `aura-std` node vocabulary, and on
+success prints a `format_version:1` #155 blueprint to stdout; on the first failing
+op it prints `op N (kind): cause` (or `finalize: cause`) to stderr and exits
+non-zero. `aura graph introspect --vocabulary | --node <T> | --unwired` answers,
+build-free: the node-type roster, one type's input ports / output fields / param
+paths, and (reading a partial op-list) the still-open interior slots. This field
+test exercised the surface purely as a downstream consumer authoring topology as
+data — public interface only (the C24/C17/C19/C23 ledger + the CLI's own output);
+no implementation source read. Binary under test: freshly built `target/debug/aura`
+(`cargo build --workspace`, nothing to recompile at HEAD).
+
+## Examples
+### fieldtests/cycle-0088-construction-op-script/c0088_1_sma_crossover.json — discover-then-author an SMA-crossover bias
+- Used `introspect --vocabulary` (22 types) then `introspect --node SMA|Sub|Bias`
+  to learn ports/kinds, then hand-wrote a 10-op script: one `price` source → two
+  SMAs (lengths 2/4) → `Sub` → `Bias`, expose `bias.bias`.
+- Fits scope: exercises `source`, `add`+`bind`, `feed` (fan-out into two slots),
+  `connect`, `expose` — the full op vocabulary in one realistic signal graph.
+- Outcome: **built, ran, matched expected.** Emitted a `format_version:1` blueprint
+  with the expected 4 nodes / 3 edges / 1 input_role / 1 output
+  (`c0088_1_blueprint.out.json`). First try, no diagnostics.
+
+### fieldtests/cycle-0088-construction-op-script/c0088_2_partial.json (+ _completed.json) — author with the --unwired helper
+- Wrote a deliberately partial doc (left `sub.rhs` and `bias` unconnected), ran
+  `introspect --unwired`, finished wiring per its report, built.
+- Fits scope: the cycle's headline build-free authoring aid.
+- Outcome: **worked.** `--unwired` reported `sub.rhs:F64` / `bias.signal:F64`
+  by-identifier with kinds; the completed doc built to a #155 blueprint;
+  `--unwired` on the completed doc returned empty (exit 0) — a reliable
+  "am I done?" check.
+
+### fieldtests/cycle-0088-construction-op-script/c0088_3*.json — error ergonomics (15 fixtures)
+- Provoked the realistic hand-author mistakes: bad node type, wrong-kind connect,
+  wrong output field, unknown node id, double-wired slot, duplicate id, bad bind
+  kind, bad expose field, unknown role, bad feed port, left-open slot, dataflow
+  cycle (self-loop + explicit 2-cycle), unfed role, no-expose, naive/untyped bind,
+  lowercase kind.
+- Fits scope: judges whether `op N (kind): cause` tells you *where* and *what*.
+- Outcome: **eager per-op messages are excellent** (by-identifier, right op index);
+  three message-quality friction points and one acceptance gap surfaced (below).
+
+### Round-trip sense-check (Task 4)
+- Piped `c0088_1_blueprint.out.json` into `aura graph`; compared to bare `aura graph`.
+- Outcome: byte-**identical** — `aura graph` ignores stdin and renders a hard-wired
+  sample. No CLI subcommand consumes an emitted #155 blueprint (see G2).
+
+## Findings
+
+### [working] Discover-then-author round-trips cleanly through the CLI
+- Examples: c0088_1, all `introspect` runs.
+- `introspect --vocabulary` lists 22 node types; `introspect --node SMA` prints
+  `in series:F64 / out value:F64 / param length:I64` — the exact dotted-port names
+  (`fast.series`, `fast.value`) and capitalized kinds the op-script consumes. An
+  author can go vocabulary → ports → op-script → `format_version:1` blueprint with
+  no source reading. This is the core promise of C24's data-authoring surface and
+  it holds.
+- Recommended action: carry-on.
+
+### [working] `--unwired` is a precise, by-identifier authoring aid
+- Examples: c0088_2_partial / _completed.
+- Reports open interior slots as `node.port:Kind` (`sub.rhs:F64`,
+  `bias.signal:F64`) and returns empty on a fully-wired doc. Exactly the
+  finish-the-wiring loop a hand-author wants; the kinds double as a connect hint.
+- Recommended action: carry-on.
+
+### [working] Eager per-op diagnostics name the op and the identifier
+- Examples: c0088_3a–h, 3j, 3k.
+- Verbatim wins: `op 1 (add): unknown node type "Smaa"`; `op 4 (connect): kind
+  mismatch g.value -> fast.series (producer Bool, consumer F64)`; `op 4 (connect):
+  node "fast" has no output field "output"`; `op 4 (connect): unknown node
+  identifier "fst"`; `op 6 (connect): slot sub.lhs already wired`; `op 2 (add):
+  duplicate identifier "fast"`; `op 2 (feed): unknown role "pryce"`; `op 2 (feed):
+  node "fast" has no input port "serie"`. Every one names the op index and speaks
+  by-identifier — you can fix without counting. Lowercase `kind:"f64"` even
+  self-documents: `unknown variant 'f64', expected one of 'I64','F64','Bool',
+  'Timestamp'`.
+- Recommended action: carry-on.
+
+### [bug] `graph build` accepts a dataflow cycle and reports success
+- Examples: c0088_3i_unfed_role (self-loop), c0088_3m_two_cycle.
+- `aura graph build < c0088_3m_two_cycle.json` → **exit 0**, emits a blueprint
+  whose edges are `{from:0,to:1,slot:0},{from:1,to:0,slot:0}` — a combinational
+  2-cycle. A self-loop (`fast.value → fast.series`, edge `{from:0,to:0}`) is
+  likewise accepted. C9 / domain-invariant 5: "The graph is a DAG; the only
+  feedback path is an explicit delay/state node." The construction service's gate
+  set (kind, interior-slot totality, param-namespace injectivity, root-role
+  boundness) omits acyclicity, so it green-lights a non-runnable blueprint and
+  calls it a success. Caveat (cadence, unverifiable as a CLI consumer): acyclicity
+  may be intended as a bootstrap-time (compile-to-`FlatGraph`) gate — but the CLI
+  exposes no compile/run path for an emitted blueprint (see G2), so a CLI consumer
+  gets no signal at all that the graph is not a DAG.
+- Repro: `aura graph build < fieldtests/cycle-0088-construction-op-script/c0088_3m_two_cycle.json; echo $?` → `0`.
+- Recommended action: debug.
+
+### [friction] The holistic `finalize` error speaks raw indices, breaking the by-identifier surface
+- Examples: c0088_2_partial.
+- `aura graph build < c0088_2_partial.json` → `aura: finalize: UnconnectedPort
+  { node: 2, slot: 1 }`. The whole op-script is authored by-identifier, and the
+  sibling `introspect --unwired` reports the *same* open slot as `sub.rhs:F64` —
+  so the identifier mapping demonstrably exists. The build finalize path drops to
+  raw `node`/`slot` indices (and Debug-struct form), forcing the author to count
+  nodes (0=fast,1=slow,2=sub) and slots to decode it.
+- Why friction: task completed (the error is non-zero and correct) but the surface
+  forced an index-counting dance the by-identifier design implies should be gone.
+- Recommended action: plan — route finalize faults through the same by-identifier
+  formatter `--unwired` already uses.
+
+### [friction] Bind-kind-mismatch leaks the Debug struct, inconsistent with the connect message
+- Examples: c0088_3g_bad_bind_kind.
+- `op 1 (add): bad param on fast: KindMismatch { param: "length", expected: I64,
+  got: F64 }` — the `KindMismatch { … }` is raw `#[derive(Debug)]`, whereas the
+  parallel connect mismatch is hand-phrased prose (`producer Bool, consumer F64`).
+  Two kind-mismatch errors, two registers.
+- Recommended action: plan — phrase the bind mismatch like the connect one.
+
+### [friction] The typed-Scalar bind form is not discoverable from introspection
+- Examples: c0088_3n_naive_bind.
+- `introspect --node SMA` shows `param length:I64` but never that a bind *value*
+  must be wrapped `{"I64": 2}`. The natural first guess `"bind":{"length":2}`
+  fails with a generic serde error: `invalid op-list: invalid type: integer 2,
+  expected string or map at line 4 column 2` — correct location, no domain hint
+  about the `{"I64": 2}` shape. (Capitalized `kind` *is* discoverable — both from
+  `introspect --node` output and the self-documenting lowercase-kind error.)
+- Recommended action: plan/doc — show the bind-value form in `introspect --node`
+  (e.g. `param length:I64  (bind {"I64": <v>})`) or hint it in the serde error.
+
+### [spec_gap] The construction surface is undiscoverable from the CLI
+- Examples: bare `aura`, `aura --help`, `aura graph build --help`.
+- Neither `aura` (no args, exit 2), `aura --help`, nor any public doc (glossary,
+  project-layout) mentions `aura graph build` or `aura graph introspect`. The
+  top-level usage string lists only the bare `aura graph` (HTML-render) arm. The
+  subcommands appear *only* in the C24 ledger Status prose. `aura graph build
+  --help` and `aura graph introspect --help` both print the giant top-level usage
+  at exit 0 (the `--help` token is swallowed); there is no per-subcommand help and
+  no statement anywhere of the op-list document shape. A genuine new user has no
+  in-CLI route to learn the surface exists or how a document is shaped.
+- Why spec_gap: the surface shipped without a discovery path; the ledger is silent
+  on whether the CLI usage should advertise it. I read the surface only because the
+  carrier named the subcommands.
+- Recommended action: tighten the design ledger / plan — add `graph build` /
+  `graph introspect` to the usage string and a `build --help` documenting the
+  op-list shape (the op kinds, the typed-Scalar bind, capitalized kind).
+
+### [spec_gap] No CLI consumer for the emitted #155 blueprint — the round-trip dead-ends
+- Examples: Task 4 (pipe c0088_1_blueprint into `aura graph`).
+- `graph build` emits a blueprint to stdout, but no subcommand reads one back:
+  `aura graph` ignores stdin and renders a hard-wired sample (verified
+  byte-identical with and without a piped blueprint), and no `aura run` /
+  `graph render` accepts a blueprint file. C24 promises topology is a value
+  "constructed, generated, mutated, serialized for reproduction, and (optionally)
+  rendered"; the load path is realised only at the library level
+  (`blueprint_from_json`, cycle 0087). A pure-CLI consumer can author and build
+  topology-as-data but cannot run, render, or reload-validate it through the CLI —
+  which is also why the cycle bug (above) is undiscoverable. Equally plausible
+  reading: `build` is intentionally an emit-only producer feeding a library/World
+  consumer — hence spec_gap, not bug.
+- Recommended action: ratify the emit-only scope, or planner — add a CLI edge that
+  consumes a #155 blueprint (render/run/validate). C24 Status already tracks #159
+  (retire hard-wired harnesses); note the missing build→consume edge there.
+
+### [spec_gap] The validity floor of `graph build` is unstated
+- Examples: c0088_3i_unfed_role, c0088_3l_no_expose.
+- Beyond the cycle (bug above), build accepts at exit 0: an unfed `source` role
+  (emitted as `"targets":[]` — a dead role kept in the blueprint) and a graph with
+  no `expose`/output at all (no `output` key emitted). The ledger names the gates
+  build *does* enforce (kind, interior-slot totality, injectivity, root-role
+  boundness) but not the minimal well-formedness it *guarantees* — so a consumer
+  can't tell whether a dead role / output-less graph is intended-valid or a
+  silently-accepted slip.
+- Recommended action: ratify (state the validity floor — what `build` does/does not
+  promise) or tighten.
+
+## Recommendation summary
+| Finding | Class | Action |
+|---|---|---|
+| Discover-then-author round-trips cleanly | working | carry-on |
+| `--unwired` precise by-identifier aid | working | carry-on |
+| Eager per-op diagnostics name op + identifier | working | carry-on |
+| `graph build` accepts a dataflow cycle | bug | debug |
+| `finalize` error speaks raw indices | friction | plan |
+| Bind-kind-mismatch leaks Debug struct | friction | plan |
+| Typed-Scalar bind form not discoverable | friction | plan / doc |
+| Construction surface undiscoverable from CLI | spec_gap | tighten ledger / plan |
+| No CLI consumer for emitted blueprint | spec_gap | ratify / plan |
+| Validity floor of `graph build` unstated | spec_gap | ratify / tighten |
+
+## Triage outcome (orchestrator, 2026-06-29)
+
+The cycle bug was reproduced directly before filing. Findings routed to the forward queue:
+
+| Finding | Disposition |
+|---|---|
+| `graph build` accepts a dataflow cycle (+ validity-floor: unfed role, no-`expose`) | filed **#161** (`bug`) — reject cyclic graphs, DAG invariant 5; validity floor decided alongside. RED-first via debug. |
+| `finalize` raw indices + bind-mismatch Debug leak + typed-Scalar bind undiscoverable | filed **#162** (polish) — three message-quality defects on the by-identifier surface. |
+| Construction surface undiscoverable from the CLI | commented on **#159** (CLI usage/help rework) — advertise the subcommands + per-subcommand `--help`. |
+| No CLI consumer for the emitted #155 blueprint (round-trip dead-end) | commented on **#28** (render a consumer's OWN graph) — the build→consume CLI edge. |
+| Three `working` findings | carry-on — the happy path, `--unwired`, and eager per-op diagnostics hold. |
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_1_blueprint.out.json b/fieldtests/cycle-0088-construction-op-script/c0088_1_blueprint.out.json
new file mode 100644
index 0000000..a8c9d74
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_1_blueprint.out.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"}}],"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}],"input_roles":[{"name":"price","targets":[{"node":0,"slot":0},{"node":1,"slot":0}],"source":"F64"}],"output":[{"node":3,"field":0,"name":"bias"}]}}
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_1_build.err b/fieldtests/cycle-0088-construction-op-script/c0088_1_build.err
new file mode 100644
index 0000000..e69de29
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_1_sma_crossover.json b/fieldtests/cycle-0088-construction-op-script/c0088_1_sma_crossover.json
new file mode 100644
index 0000000..6112d38
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_1_sma_crossover.json
@@ -0,0 +1,12 @@
+[
+  {"op": "source", "role": "price", "kind": "F64"},
+  {"op": "add", "type": "SMA", "as": "fast", "bind": {"length": {"I64": 2}}},
+  {"op": "add", "type": "SMA", "as": "slow", "bind": {"length": {"I64": 4}}},
+  {"op": "feed", "role": "price", "into": ["fast.series", "slow.series"]},
+  {"op": "add", "type": "Sub", "as": "sub"},
+  {"op": "connect", "from": "fast.value", "to": "sub.lhs"},
+  {"op": "connect", "from": "slow.value", "to": "sub.rhs"},
+  {"op": "add", "type": "Bias", "as": "bias"},
+  {"op": "connect", "from": "sub.value", "to": "bias.signal"},
+  {"op": "expose", "from": "bias.bias", "as": "bias"}
+]
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_2_blueprint.out.json b/fieldtests/cycle-0088-construction-op-script/c0088_2_blueprint.out.json
new file mode 100644
index 0000000..9b65d65
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_2_blueprint.out.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":3}}]}},{"primitive":{"type":"SMA","name":"slow","bound":[{"pos":0,"name":"length","kind":"I64","value":{"I64":8}}]}},{"primitive":{"type":"Sub","name":"sub"}},{"primitive":{"type":"Bias","name":"bias"}}],"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}],"input_roles":[{"name":"price","targets":[{"node":0,"slot":0},{"node":1,"slot":0}],"source":"F64"}],"output":[{"node":3,"field":0,"name":"bias"}]}}
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_2_build.err b/fieldtests/cycle-0088-construction-op-script/c0088_2_build.err
new file mode 100644
index 0000000..e69de29
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_2_completed.json b/fieldtests/cycle-0088-construction-op-script/c0088_2_completed.json
new file mode 100644
index 0000000..15edb0b
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_2_completed.json
@@ -0,0 +1,12 @@
+[
+  {"op": "source", "role": "price", "kind": "F64"},
+  {"op": "add", "type": "SMA", "as": "fast", "bind": {"length": {"I64": 3}}},
+  {"op": "add", "type": "SMA", "as": "slow", "bind": {"length": {"I64": 8}}},
+  {"op": "feed", "role": "price", "into": ["fast.series", "slow.series"]},
+  {"op": "add", "type": "Sub", "as": "sub"},
+  {"op": "connect", "from": "fast.value", "to": "sub.lhs"},
+  {"op": "connect", "from": "slow.value", "to": "sub.rhs"},
+  {"op": "add", "type": "Bias", "as": "bias"},
+  {"op": "connect", "from": "sub.value", "to": "bias.signal"},
+  {"op": "expose", "from": "bias.bias", "as": "bias"}
+]
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_2_partial.json b/fieldtests/cycle-0088-construction-op-script/c0088_2_partial.json
new file mode 100644
index 0000000..25248d8
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_2_partial.json
@@ -0,0 +1,9 @@
+[
+  {"op": "source", "role": "price", "kind": "F64"},
+  {"op": "add", "type": "SMA", "as": "fast", "bind": {"length": {"I64": 3}}},
+  {"op": "add", "type": "SMA", "as": "slow", "bind": {"length": {"I64": 8}}},
+  {"op": "feed", "role": "price", "into": ["fast.series", "slow.series"]},
+  {"op": "add", "type": "Sub", "as": "sub"},
+  {"op": "connect", "from": "fast.value", "to": "sub.lhs"},
+  {"op": "add", "type": "Bias", "as": "bias"}
+]
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_2_partial_build.err b/fieldtests/cycle-0088-construction-op-script/c0088_2_partial_build.err
new file mode 100644
index 0000000..164fbbd
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_2_partial_build.err
@@ -0,0 +1 @@
+aura: finalize: UnconnectedPort { node: 2, slot: 1 }
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_3a_bad_type.json b/fieldtests/cycle-0088-construction-op-script/c0088_3a_bad_type.json
new file mode 100644
index 0000000..854dc74
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_3a_bad_type.json
@@ -0,0 +1,6 @@
+[
+  {"op": "source", "role": "price", "kind": "F64"},
+  {"op": "add", "type": "Smaa", "as": "fast", "bind": {"length": {"I64": 2}}},
+  {"op": "feed", "role": "price", "into": ["fast.series"]},
+  {"op": "expose", "from": "fast.value", "as": "out"}
+]
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_3b_wrong_kind.json b/fieldtests/cycle-0088-construction-op-script/c0088_3b_wrong_kind.json
new file mode 100644
index 0000000..ce06f27
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_3b_wrong_kind.json
@@ -0,0 +1,8 @@
+[
+  {"op": "source", "role": "price", "kind": "F64"},
+  {"op": "add", "type": "Gt", "as": "g"},
+  {"op": "add", "type": "SMA", "as": "fast", "bind": {"length": {"I64": 2}}},
+  {"op": "feed", "role": "price", "into": ["g.a", "g.b"]},
+  {"op": "connect", "from": "g.value", "to": "fast.series"},
+  {"op": "expose", "from": "fast.value", "as": "out"}
+]
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_3c_wrong_port.json b/fieldtests/cycle-0088-construction-op-script/c0088_3c_wrong_port.json
new file mode 100644
index 0000000..f0143f4
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_3c_wrong_port.json
@@ -0,0 +1,8 @@
+[
+  {"op": "source", "role": "price", "kind": "F64"},
+  {"op": "add", "type": "SMA", "as": "fast", "bind": {"length": {"I64": 2}}},
+  {"op": "add", "type": "Sub", "as": "sub"},
+  {"op": "feed", "role": "price", "into": ["fast.series"]},
+  {"op": "connect", "from": "fast.output", "to": "sub.lhs"},
+  {"op": "expose", "from": "sub.value", "as": "out"}
+]
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_3d_unknown_node_id.json b/fieldtests/cycle-0088-construction-op-script/c0088_3d_unknown_node_id.json
new file mode 100644
index 0000000..94f30f7
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_3d_unknown_node_id.json
@@ -0,0 +1,8 @@
+[
+  {"op": "source", "role": "price", "kind": "F64"},
+  {"op": "add", "type": "SMA", "as": "fast", "bind": {"length": {"I64": 2}}},
+  {"op": "add", "type": "Sub", "as": "sub"},
+  {"op": "feed", "role": "price", "into": ["fast.series"]},
+  {"op": "connect", "from": "fst.value", "to": "sub.lhs"},
+  {"op": "expose", "from": "sub.value", "as": "out"}
+]
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_3e_double_wired.json b/fieldtests/cycle-0088-construction-op-script/c0088_3e_double_wired.json
new file mode 100644
index 0000000..a87022d
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_3e_double_wired.json
@@ -0,0 +1,10 @@
+[
+  {"op": "source", "role": "price", "kind": "F64"},
+  {"op": "add", "type": "SMA", "as": "fast", "bind": {"length": {"I64": 2}}},
+  {"op": "add", "type": "SMA", "as": "slow", "bind": {"length": {"I64": 4}}},
+  {"op": "add", "type": "Sub", "as": "sub"},
+  {"op": "feed", "role": "price", "into": ["fast.series", "slow.series"]},
+  {"op": "connect", "from": "fast.value", "to": "sub.lhs"},
+  {"op": "connect", "from": "slow.value", "to": "sub.lhs"},
+  {"op": "expose", "from": "sub.value", "as": "out"}
+]
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_3f_dup_name.json b/fieldtests/cycle-0088-construction-op-script/c0088_3f_dup_name.json
new file mode 100644
index 0000000..1cf1ac9
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_3f_dup_name.json
@@ -0,0 +1,7 @@
+[
+  {"op": "source", "role": "price", "kind": "F64"},
+  {"op": "add", "type": "SMA", "as": "fast", "bind": {"length": {"I64": 2}}},
+  {"op": "add", "type": "SMA", "as": "fast", "bind": {"length": {"I64": 4}}},
+  {"op": "feed", "role": "price", "into": ["fast.series"]},
+  {"op": "expose", "from": "fast.value", "as": "out"}
+]
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_3g_bad_bind_kind.json b/fieldtests/cycle-0088-construction-op-script/c0088_3g_bad_bind_kind.json
new file mode 100644
index 0000000..4cbe630
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_3g_bad_bind_kind.json
@@ -0,0 +1,6 @@
+[
+  {"op": "source", "role": "price", "kind": "F64"},
+  {"op": "add", "type": "SMA", "as": "fast", "bind": {"length": {"F64": 2.0}}},
+  {"op": "feed", "role": "price", "into": ["fast.series"]},
+  {"op": "expose", "from": "fast.value", "as": "out"}
+]
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_3h_bad_expose.json b/fieldtests/cycle-0088-construction-op-script/c0088_3h_bad_expose.json
new file mode 100644
index 0000000..7d5a3f6
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_3h_bad_expose.json
@@ -0,0 +1,6 @@
+[
+  {"op": "source", "role": "price", "kind": "F64"},
+  {"op": "add", "type": "SMA", "as": "fast", "bind": {"length": {"I64": 2}}},
+  {"op": "feed", "role": "price", "into": ["fast.series"]},
+  {"op": "expose", "from": "fast.zzz", "as": "out"}
+]
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_3i_unfed_role.json b/fieldtests/cycle-0088-construction-op-script/c0088_3i_unfed_role.json
new file mode 100644
index 0000000..7d2feac
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_3i_unfed_role.json
@@ -0,0 +1,6 @@
+[
+  {"op": "source", "role": "price", "kind": "F64"},
+  {"op": "add", "type": "SMA", "as": "fast", "bind": {"length": {"I64": 2}}},
+  {"op": "connect", "from": "fast.value", "to": "fast.series"},
+  {"op": "expose", "from": "fast.value", "as": "out"}
+]
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_3j_unknown_role.json b/fieldtests/cycle-0088-construction-op-script/c0088_3j_unknown_role.json
new file mode 100644
index 0000000..9d07175
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_3j_unknown_role.json
@@ -0,0 +1,6 @@
+[
+  {"op": "source", "role": "price", "kind": "F64"},
+  {"op": "add", "type": "SMA", "as": "fast", "bind": {"length": {"I64": 2}}},
+  {"op": "feed", "role": "pryce", "into": ["fast.series"]},
+  {"op": "expose", "from": "fast.value", "as": "out"}
+]
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_3k_feed_bad_port.json b/fieldtests/cycle-0088-construction-op-script/c0088_3k_feed_bad_port.json
new file mode 100644
index 0000000..d7adfda
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_3k_feed_bad_port.json
@@ -0,0 +1,6 @@
+[
+  {"op": "source", "role": "price", "kind": "F64"},
+  {"op": "add", "type": "SMA", "as": "fast", "bind": {"length": {"I64": 2}}},
+  {"op": "feed", "role": "price", "into": ["fast.serie"]},
+  {"op": "expose", "from": "fast.value", "as": "out"}
+]
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_3l_no_expose.json b/fieldtests/cycle-0088-construction-op-script/c0088_3l_no_expose.json
new file mode 100644
index 0000000..809b65e
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_3l_no_expose.json
@@ -0,0 +1,5 @@
+[
+  {"op": "source", "role": "price", "kind": "F64"},
+  {"op": "add", "type": "SMA", "as": "fast", "bind": {"length": {"I64": 2}}},
+  {"op": "feed", "role": "price", "into": ["fast.series"]}
+]
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_3m.err b/fieldtests/cycle-0088-construction-op-script/c0088_3m.err
new file mode 100644
index 0000000..e69de29
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_3m_blueprint.out.json b/fieldtests/cycle-0088-construction-op-script/c0088_3m_blueprint.out.json
new file mode 100644
index 0000000..c188f16
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_3m_blueprint.out.json
@@ -0,0 +1 @@
+{"format_version":1,"blueprint":{"name":"graph","nodes":[{"primitive":{"type":"Sub","name":"a"}},{"primitive":{"type":"Sub","name":"b"}}],"edges":[{"from":0,"to":1,"slot":0,"from_field":0},{"from":1,"to":0,"slot":0,"from_field":0}],"input_roles":[{"name":"price","targets":[{"node":0,"slot":1},{"node":1,"slot":1}],"source":"F64"}],"output":[{"node":0,"field":0,"name":"out"}]}}
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_3m_two_cycle.json b/fieldtests/cycle-0088-construction-op-script/c0088_3m_two_cycle.json
new file mode 100644
index 0000000..b833484
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_3m_two_cycle.json
@@ -0,0 +1,9 @@
+[
+  {"op": "source", "role": "price", "kind": "F64"},
+  {"op": "add", "type": "Sub", "as": "a"},
+  {"op": "add", "type": "Sub", "as": "b"},
+  {"op": "feed", "role": "price", "into": ["a.rhs", "b.rhs"]},
+  {"op": "connect", "from": "a.value", "to": "b.lhs"},
+  {"op": "connect", "from": "b.value", "to": "a.lhs"},
+  {"op": "expose", "from": "a.value", "as": "out"}
+]
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_3n_naive_bind.json b/fieldtests/cycle-0088-construction-op-script/c0088_3n_naive_bind.json
new file mode 100644
index 0000000..f5086a9
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_3n_naive_bind.json
@@ -0,0 +1,6 @@
+[
+  {"op": "source", "role": "price", "kind": "F64"},
+  {"op": "add", "type": "SMA", "as": "fast", "bind": {"length": 2}},
+  {"op": "feed", "role": "price", "into": ["fast.series"]},
+  {"op": "expose", "from": "fast.value", "as": "out"}
+]
diff --git a/fieldtests/cycle-0088-construction-op-script/c0088_3o_lc_kind.json b/fieldtests/cycle-0088-construction-op-script/c0088_3o_lc_kind.json
new file mode 100644
index 0000000..4047255
--- /dev/null
+++ b/fieldtests/cycle-0088-construction-op-script/c0088_3o_lc_kind.json
@@ -0,0 +1,6 @@
+[
+  {"op": "source", "role": "price", "kind": "f64"},
+  {"op": "add", "type": "SMA", "as": "fast", "bind": {"length": {"I64": 2}}},
+  {"op": "feed", "role": "price", "into": ["fast.series"]},
+  {"op": "expose", "from": "fast.value", "as": "out"}
+]