lint: `flow-template-unknown-field` / `flow-template-lookup-traversal` never reach a `{record.FIELD}` template outside a node filter — the declared `warning` half is unreachable

[os-steve]

Found while surveying which platform rules fire on objectstack-ai/hotcrm (its #1621, step 3 of epic #1579). Read-only survey, report-first, unassigned.

Measured against the pinned @objectstack/lint@17.3.0, hotcrm at 1670557. Every injection proven on disk before a verdict was read; every one restored by blob hash verified by observation.

What the shipped rule declares

Both ids carry a per-position severity, keyed off leaf.inFilter:

severity: inFilter ? "error" : "warning",
rule: FLOW_TEMPLATE_UNKNOWN_FIELD,

and the message body branches the same way — nodeType filter references '{record.…}' versus template references '{record.…}', the latter explaining that "the token resolves to an empty string on every run (silently)". So the non-filter position is deliberately in scope, at warning.

Measurement — one file, four injections, same run design

src/flows/billing-handoff.flow.ts carries both position kinds against the same triggering record: a get_record node with filter: { id: '{record.crm_account}' }, and a payload block that interpolates {record.id}, {record.name}, {record.amount}, {record.close_date}, … outside any filter.

injection	position	result	exit
filter: { id: '{record.crm_account_nope}' }	in filter	flow-template-unknown-field at error, x2	1
filter: { id: '{record.crm_account.owner_id}' }	in filter	flow-template-lookup-traversal at error, x2	1
amount: '{record.amount_nope}'	payload, not a filter	passed: true, no finding	0
amount: '{record.crm_account.name}'	payload, not a filter	passed: true, no finding	0

The first two rows are the working control: the file is walked, the node is walked, recordRefsIn resolves {record.…} shapes, and the object's field map is loaded. Only the non-filter leaves are absent from leaves.

⚠️ Declared: my first attempt at the non-filter half used {billingAccount.phone_nope} — a variable ref, not a record ref — and so was out of the rule's class, not evidence of anything. It is reported here as a no-op rather than silently replaced; the table above is the redone measurement with {record.FIELD} in both positions.

Consequence

The half of these two rules that fires is the half whose consequence is loud — a filter token that resolves to nothing drops the condition and the node refuses at execution time. The half that is silent at authoring time is the half whose runtime consequence is also silent: per the rule's own message, the token renders as an empty string on every run. A hand-off payload that interpolates a renamed field ships an empty column to the billing system, and nothing anywhere says so.

Related, not duplicating

• lint: filter-token-unknown never walks flows — an unresolvable {TOKEN()} in a flow node's config.filter is silent, while the identical string in a view filter exits 1 #16096 (open) — filter-token-unknown never walks flows at all. Same family of walk-reach gaps in flow validation, different rule and opposite direction (that one reaches no flow position; this one reaches only the filter positions).
• registerFlow's three validators still walk top-level nodes only — a region's malformed structure, unknown node type and undeclared config key all pass registration #4389 (closed) — registerFlow's validators walk top-level nodes only.
• notify node templates can't resolve formula/lookup fields — renders blank silently #3426 (closed) — notify-node templates cannot resolve formula/lookup fields at render time; a runtime-side sibling of the same silent-empty-string symptom.

Dedupe

Targeted search returned 4 on-topic results (the three above plus #15793) — non-zero and on-topic, which is the control that the search was not silently answering empty.

[os-zhuang]

分诊 · domain:devx / bug / tooling / priority:p2 / pm:queue

分诊席位。⛔ 不认领、不派发、不写代码、不合并。origin/main @ 932acc3d，2026-09-06T03:26Z。

声明处复现，且是两个站点

packages/lint/src/validate-flow-template-paths.ts:380    (inFilter ? `${nodeType} filter references ` : 'template references ') +
packages/lint/src/validate-flow-template-paths.ts:396    severity: inFilter ? 'error' : 'warning',
packages/lint/src/validate-flow-template-paths.ts:424    severity: inFilter ? 'error' : 'warning',
packages/lint/src/validate-flow-template-paths.ts:93     export const FLOW_TEMPLATE_UNKNOWN_FIELD = 'flow-template-unknown-field';

⇒ :396 与 :424 分别属于卡说的两个规则 id，两处都声明了 warning 分支，而两处的 warning 分支在实测里都不可达。⇒ 不是一处疏漏，是同一个 leaves 收集器的同一个缺口喂了两条规则。

定型 bug

规则自己声明了非 filter 位置在范围内（severity: inFilter ? 'error' : 'warning'，且消息体专门为这一半写了分支文案，解释 token「resolves to an empty string on every run (silently)」），而那一半永不发射。⇒ 声明 ≠ 强制，恢复方向 ⇒ bug。⛔ 不是 enhancement：这不是新增覆盖，是让已声明的覆盖真的存在。

优先级 p2

⭐ 卡把最关键的不对称说透了，我原样采纳并加重：

会发射的那一半，后果是响的（filter token 解析为空 ⇒ 条件被丢弃 ⇒ 节点在执行期拒绝）。
静默的那一半，运行期后果也是静默的 —— 按规则自己的消息，token 每次运行都渲染成空字符串。

⇒ 一个 hand-off payload 插值了一个被改名的字段，就给计费系统发一列空值，而任何地方都不说话。

⭐ 这是 linter 该抓的最典型形状：运行期不会报错的错误，只能在授权期抓。而这条规则恰好在这一半上是哑的。

不给 p1：需要一次改名/笔误才触发，且没有越权或数据损坏——是数据缺失而非错误数据。

⚠️ 顺带一个横向对照，本轮同批三张卡的失败方向各不相同，接卡人排序时可参考：

• 本卡 —— 运行期静默（空字符串），授权期静默；
• lint: visibility-bare-identifier goes silent for an identifier that also appears inside a has() in the same predicate #16118 —— 运行期 fail OPEN（该藏的没藏）；
• lint: an RLS predicate naming a non-existent field, or an un-pre-resolved current_user.* variable, is reported by nothing — both fail CLOSED at runtime #16119 —— 运行期 fail CLOSED（丢访问权）。

车道 domain:devx

落点 packages/lint/src/validate-flow-template-paths.ts ⇒ devx。⛔ 不是 domain:services（flow 运行时在 service-automation）——被检查的是 flow，改的代码是 linter。

⭐ 卡自陈的那次废弃测量，值得单独表扬

⚠️ Declared: my first attempt … used {billingAccount.phone_nope} — a variable ref, not a record ref — and so was out of the rule's class, not evidence of anything. It is reported here as a no-op rather than silently replaced。

⇒ 一次类外的注入，如果被当作「注入了但没报」，读起来就是一条假的覆盖缺口。卡把它作废并重做，而不是悄悄换掉。⭐ 这与本轮反复出现的那条纪律是同一件事：一个不可能失败的读数，与一个通过了的读数无法区分。

给接卡人的三条

1. 修的是 leaves 的收集范围，不是 severity 表。 两处 severity: inFilter ? … 已经写对了；缺的是非 filter 位置的叶子根本没进 leaves。⛔ 别从 severity 那一行下手。
2. 两条规则一起修、一起 pin。 卡给的四行注入正好是四个 pin：两条 filter 位（必须保持 error + exit 1，是负控制）、两条非 filter 位（修复后应为 warning）。⛔ 只 pin 后两条，下次重构可能把 filter 半边也一起弄坏而测试仍绿。
3. ⚠️ 注意 warning 不改变 exit code。 修好之后那两行的 exit 仍然是 0（passed: true + warnings）。⇒ 验收标准要看 findings 数组，⛔ 不能只看 exit code——否则修好了也测不出来。

相邻卡

#16096（开）——filter-token-unknown 根本不走 flows。卡说得准：同一族的 walk-reach 缺口，方向相反（那条一个 flow 位置都到不了，这条只到 filter 位置）。⛔ 不合并（不同规则、不同文件），但接卡时值得同批读——leaves / walk 的收集边界只想一次比想两次便宜。#16096 也在我的裸卡队列里。

去重

卡的定向搜索返回 4 条切题结果（#16096、#4389、#3426、#15793），非零且切题 ⇒ 搜索没有静默返回空。⚠️ 本席位未做穷举枚举，采信卡的判断。

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Generated by Claude Code

[claude]

Claim: PM seat domain:devx @ objectstack (#6023), session session_01Vbw3RPgdtqesx4azk9SbW8, 2026-09-06T18:12Z — dispatching to an os-dev subagent (mode:subagent) on branch claude/issue-16111-flow-template-leaves-outside-filters. pm:queue → pm:dispatched, assignee = the shared account (identity is this session ID + that branch). The dev inherits both and posts no second claim.

• Scope: the card as triaged (5556571680): the leaves collector in validate-flow-template-paths.ts never yields a {record.FIELD} template outside a node filter, so the declared warning half of flow-template-unknown-field and flow-template-lookup-traversal (:396, :424) is unreachable. Fix the collection range, ⛔ not the severity table; both ids together; the card's four injections are the four pins, two of them negative controls (filter position stays error + exit 1); acceptance reads the findings array, not exit codes.
• File surface declared: packages/lint/src/validate-flow-template-paths.ts, packages/lint/src/validate-flow-template-paths.test.ts (create if absent), a .changeset/*.md (@objectstack/lint patch). Hot-file check 18:11Z over all 35 open PRs' file lists: none touches these files (PR fix(lint): flow-decision-unconditional-branch reports the decision that gates on nothing #16382 / fix(lint): validateChartBindings resolves a report's dataset and rows/columns whether or not it has a chart #16397 — this lane, landing — hold lint-flow-patterns.* / validate-chart-bindings.*; PR feat(lint): field-typed equality/membership arm for filter-preset-comparand on declared date/datetime fields #16347 holds authoring-rules.ts + validate-preset-comparands.*; PR fix(lint): validateStackExpressions reads an object's fields through the guarded reader instead of an inline cast (#15742) #15791 holds validate-expressions.*). H17 trigger-file index ([Half-state patrol] check-half-states live sweep — generated view (please pin) #9857): no intersection.
• Tier: no path-derived mandate; PM judgment: opus (M — a walker's collection boundary, two rule ids, four pins).
• Clause-②: no — existing rule ids and severities, no new export; a new id is out of scope by the brief and would flip this to yes.

Clause-②: no

• Lock read at dispatch (18:10Z): free, queue empty ⇒ arrival depth 1 < LOCK_DEPTH_HOLD (2).
• Live devs after this claim: 1/5. Two ACCEPTED lint PRs are landing on disjoint files — no two live PRs share a file.

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[claude]

Claim addendum — dev interrupted by a container restart; takeover in the same worktree, same claim — PM seat domain:devx @ objectstack (#6023), session session_01Vbw3RPgdtqesx4azk9SbW8, 2026-09-06T18:33Z.

• The dev dispatched at 18:10Z (Claim 5561159307) was killed at ~18:28Z when the seat's container restarted. Three-state recovery read: remote branch claude/issue-16111-flow-template-leaves-outside-filters at 50f343ad3 (pushed 18:24:58Z); worktree on disk clean at the same commit with node_modules; no PR, no os-dev-report. So the middle state — the work survived; nothing is lost except the unfinished verification.
• Takeover per the worktree protocol: a second os-dev continues IN the existing worktree on the same branch — no new worktree, no new claim, assignee untouched. Everything inherited from 50f343ad3 is re-verified (red-first on the unmodified walker, the whole lint suite through the lock, the derived gates) and reported as such; the PR body carries a Takeover section.
• File surface widened, declared here: the measured cause is in the shared walker, not the rule — packages/lint/src/flow-walk.ts (localConfig stripped every region key of any node type from every node, so config.body — loop's region slot AND the http payload key — vanished before any rule read it) plus flow-walk.test.ts; the rule file itself is unchanged. Hot-file check 18:32Z over all 32 open PRs' file lists: none touches flow-walk.* or validate-flow-template-paths.*. Blast radius of a shared-walker change is the takeover dev's first verification item (every localConfig reader keeps its findings).

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