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This skill drives the zillow-pp-cli binary. You must verify the CLI is installed before invoking any command from this skill. If it is missing, install it first:
Install via the Printing Press installer. It defaults binaries to $HOME/.local/bin on macOS/Linux and %LOCALAPPDATA%\Programs\PrintingPress\bin on Windows:
Ensure the reported install directory is on $PATH for the agent/runtime that will invoke this skill.
If the npx install fails (no Node, offline, etc.), fall back to a direct Go install (requires Go 1.26.5 or newer). This installs into $GOPATH/bin (default $HOME/go/bin), so add that directory to $PATH instead:
go install github.com/mvanhorn/printing-press-library/library/other/zillow/cmd/zillow-pp-cli@latest
If --version reports "command not found" after install, the runtime cannot see the binary directory on $PATH. Do not proceed with skill commands until verification succeeds.
Sync public Zillow Research time series, compare regions, and build sourced affordability, supply, demand, negotiation, and relocation analysis. Core commands never scrape Zillow.com; optional Bridge requests remain separately authorized and uncached.
High-value workflows
Use --agent for JSON, compact output, and non-interactive behavior.
Bridge responses are never cached. Never put its token in command arguments, URLs, notes, or output.
When Not to Use This CLI
Do not activate this CLI for requests that require creating, updating, deleting, publishing, commenting, upvoting, inviting, ordering, sending messages, booking, purchasing, or changing remote state. This printed CLI exposes read-only commands for inspection, export, sync, and analysis.
Unique Capabilities
These capabilities aren't available in any other tool for this API.
Client decisions
affordability gap — Compare household income with Zillow's regional homeowner-income-needed estimate.
Use when an agent must turn a generic affordability estimate into a client-specific answer.
zillow-pp-cli affordability gap "Austin, TX" --income 120000 --agent
yield-proxy — Join ZORI and ZHVI on a common date for a transparent gross rent-to-value proxy.
Use for quick, explainable rent-versus-value comparisons without pretending the proxy is net yield.
zillow-pp-cli yield-proxy "Austin, TX" --agent
buy-vs-rent — Run a visible-assumption ownership-versus-rent cash-flow scenario.
Use when an agent needs an inspectable scenario rather than a black-box recommendation.
Keeps only the region, core metrics, and evidence fields for low-context agent use.
Offline SQL
zillow-pp-cli sql "SELECT metric, COUNT(*) AS rows FROM observations GROUP BY metric" --agent
Queries normalized observations locally after sync with a read-only SQL gate.
Command Reference
research — Official Zillow Research regional time-series downloads.
zillow-pp-cli research days-pending — Download monthly metro mean days-to-pending observations.
zillow-pp-cli research homeowner-income — Download monthly metro income-needed estimates for a typical home purchase with 20 percent down.
zillow-pp-cli research inventory — Download monthly metro for-sale inventory observations.
zillow-pp-cli research market-temperature — Download monthly metro market-temperature index observations.
zillow-pp-cli research new-con-price — Download monthly metro new-construction median sale prices.
zillow-pp-cli research new-con-price-per-sqft — Download monthly metro new-construction median sale price per square foot.
zillow-pp-cli research new-con-sales — Download monthly metro new-construction sales counts.
zillow-pp-cli research price-cut-share — Download monthly metro share of listings with a price cut.
zillow-pp-cli research sale-to-list — Download monthly metro mean sale-to-list ratio observations.
zillow-pp-cli research sales — Download monthly metro sales-count nowcast observations.
zillow-pp-cli research total-monthly-payment — Download monthly metro total housing payment estimates for a typical home purchase with 20 percent down.
zillow-pp-cli research zhvf — Download monthly metro Zillow Home Value Forecast growth observations.
zillow-pp-cli research zhvi — Download monthly metro Zillow Home Value Index observations.
zillow-pp-cli research zhvi-bottom-tier — Download monthly metro bottom-tier Zillow Home Value Index observations.
zillow-pp-cli research zhvi-top-tier — Download monthly metro top-tier Zillow Home Value Index observations.
zillow-pp-cli research zordi — Download monthly metro Zillow Observed Renter Demand Index observations.
zillow-pp-cli research zori — Download monthly metro Zillow Observed Rent Index observations.
Finding the right command
When you know what you want to do but not which command does it, ask the CLI directly:
zillow-pp-cli which"<capability in your own words>"
which resolves a natural-language capability query to the best matching command from this CLI's curated feature index. Exit code 0 means at least one match; exit code 2 means no confident match — fall back to --help or use a narrower query.
Auth Setup
Public Zillow Research commands require no authentication. Bridge access is optional and requires an approved BRIDGE_ACCESS_TOKEN; the CLI sends it only as bearer authorization and never caches Bridge responses.
Run zillow-pp-cli doctor to verify setup.
Agent Mode
Add --agent to any command. Expands to: --json --compact --no-input --no-color --yes.
Pipeable — JSON on stdout, errors on stderr
Filterable — --select keeps a subset of fields. Dotted paths descend into nested structures; arrays traverse element-wise. Critical for keeping context small on verbose APIs:
zillow-pp-cli research days-pending --agent --selectid,name,status
Previewable — --dry-run shows the request without sending
Offline-friendly — sync/search commands can use the local SQLite store when available
Non-interactive — never prompts, every input is a flag
Read-only — do not use this CLI for create, update, delete, publish, comment, upvote, invite, order, send, or other mutating requests
Response envelope
Commands that read from the local store or the API wrap output in a provenance envelope:
Parse .results for data and .meta.source to know whether it's live or local. A human-readable N results (live) summary is printed to stderr only when stdout is a terminal AND no machine-format flag (--json, --csv, --compact, --quiet, --plain, --select) is set — piped/agent consumers and explicit-format runs get pure JSON on stdout.
Paths and state
Agents should treat the CLI's path resolver as part of the runtime contract:
Use --home <dir> for one invocation, or set ZILLOW_HOME=<dir> to relocate all four path kinds under one root.
Use per-kind env vars only when a specific kind must diverge: ZILLOW_CONFIG_DIR, ZILLOW_DATA_DIR, ZILLOW_STATE_DIR, ZILLOW_CACHE_DIR.
Resolution order is per-kind env var, --home, ZILLOW_HOME, XDG (XDG_CONFIG_HOME, XDG_DATA_HOME, XDG_STATE_HOME, XDG_CACHE_HOME), then platform defaults.
config contains settings like config.toml and profiles. data contains credentials.toml, data.db, cookies, and auth sidecars. state contains persisted queries, jobs, and teach.log. cache contains regenerable HTTP/cache files.
Stored secrets live in credentials.toml under the data dir. Existing legacy config.toml secrets are read for compatibility and leave config.toml on the first auth write.
Run zillow-pp-cli doctor --fail-on warn to surface path and credential-location warnings. agent-context exposes a schema v4 paths block for agents that need the resolved dirs.
For MCP, pass relocation through the MCP host config. The MCP binary does not inherit CLI flags:
Fleet precedence: an inherited per-kind env var overrides an explicit --home for that kind. Use ZILLOW_HOME or per-kind vars as durable fleet levers, and use --home only for a single invocation. Relocation is not reversible by unsetting env vars; move files manually before clearing ZILLOW_HOME, or doctor will not find credentials left under the former root.
Automatic learning
This CLI ships a self-capturing learning loop. The CLI does its own bookkeeping: every invocation is journaled locally, a failed flag followed by a corrected retry auto-derives a flag_alias candidate, and a teach on a query family without a playbook auto-synthesizes a playbook_candidate from the session's journal. Your job is judgment only: recall first, act on surfaced candidates, teach the final answer, playbook amend when you observe a correction. You never record failures by hand.
Step 1: recall before any discovery
Before list/search/drill commands on a new user question, run:
zillow-pp-cli recall "<user's question>" --agent
The response envelope:
{"query":"...","normalized":"<normalized form>","query_entities":["..."],"found":true | false,"match_score":0.0,"results":[{"resource_id":"...","resource_type":"...","venue":"...","confidence":2,"entity_match":"exact|partial|unknown","source":"taught|preseed|pattern","warnings":["..."]}],"mismatches":[/* only when --debug-mismatches */],"warnings":[/* top-level */],"candidates":[{"id":12,"class":"flag_alias | playbook_candidate","summary":"...","sightings":3,"last_seen":"...","rationale":"...","next_action":["<trial command>","zillow-pp-cli learnings confirm 12"]}],"playbook":{"query_family":"...","playbook":{"steps":[{"cmd":"<command with {slot} substitution>","purpose":"..."}],"entity_slots":["$ENTITY"],"expected_tool_calls":3},"slots_resolved":{"$ENTITY":{"token":"<live token>","canonical":"<canonical>"}},"notes":"<workarounds + gotchas for this query family>"},"notes":"<duplicate surface for non-playbook callers>"}
Empty-store short-circuit: if the store has no learnings, playbooks, or candidates yet (recall finds nothing and learnings list and learnings candidates are both empty), skip recall for the rest of this session instead of taxing every query; resume recall-first once something has been taught.
Step 2: decision tree
Read candidates, playbook, notes, results[0], and warnings in that order:
if Candidates present (warnings include "candidates_present"):
-> candidates are try-then-confirm, never facts. Follow each candidate's
two-step next_action verbatim: run the trial command first, then run
`learnings confirm <id>` only after the trial verified the behavior.
Reject a wrong candidate with `learnings reject <id>`.
-> NEVER re-teach something recall surfaced as a candidate; confirm or
reject that candidate instead of teaching a duplicate.
-> candidates ride alongside playbooks and resource hits, not instead of
them; continue with the branches below after acting on them.
if Playbook present:
-> READ Playbook.notes verbatim FIRST (workarounds + gotchas the CLI surface doesn't expose)
-> replay Playbook.steps in order, substituting Playbook.slots_resolved entries
for the entity slot tokens. If a step's slot is unresolved, fall back to
discovery for that step only.
-> the Playbook's expected_tool_calls is a budget; if you find yourself running
materially more, record the divergence via `zillow-pp-cli playbook amend`
at end-of-session.
elif Notes present (no Playbook):
-> read Notes verbatim before any discovery step; they carry known gotchas
for this query family even when no structured choreography exists yet.
elif Found AND Results[0].EntityMatch == "exact" AND Results[0].Confidence >= 2:
-> skip discovery; fetch live data for Results[*].ResourceID in parallel
elif Found AND Results[0].EntityMatch == "partial":
-> candidate hint, NOT a hit; read the resource title to validate before trusting
elif (any row in Mismatches[] when --debug-mismatches was passed):
-> treat as cold start; the stored learning is for a different entity
(different canonical resolved from query_entities)
else: // Found == false, no playbook, no notes
-> cold start; run discovery normally; teach the answer afterward (Step 4).
If the family has no playbook yet, that teach auto-synthesizes a
playbook candidate from this session's journal - you do not need to
record one by hand.
Playbook and Notes are orthogonal to the per-resource path. A recall response can carry both a Playbook AND a Results[] hit - use both: the Playbook tells you which choreography to run; the resource hits short-circuit specific steps. Default to skipping mismatches; pass --debug-mismatches only when investigating cold-start surprises.
Candidate judgment details: learnings confirm <id> prints the candidate's full payload before materializing it - check that the printed payload matches the behavior you verified. learnings reject <id> tombstones the derivation signature so the same candidate does not resurface. The envelope carries only the few candidates worth acting on now; zillow-pp-cli learnings candidates lists the full open set.
Graceful degradation: if learnings confirm is an unknown command, you are driving an older binary - ignore the candidates guidance and follow the rest of the protocol.
Step 3: always read warnings
low_confidence: row exists at confidence<2. Treat as a hint, not a skip-discovery hit.
resource_not_in_store: the local store doesn't have the resource the learning points at. The match validator couldn't classify entities — direct-fetch and re-evaluate.
cross_alias_match (per-result): the row was taught under a different alias and matched the live query's canonical via entity_lookups (e.g., a "USA" teach satisfying a "United States" recall). Trust the resource_id.
similar_shape_different_entity:<canonical> (top-level): a structurally matching row exists but its canonical entity differs from the live query's. Treated as cold start; the warning carries the conflicting canonical as a hint, but the row is NOT promoted into Results.
ambiguous_alias (top-level): a single query entity resolved to multiple canonicals (e.g., "Cards" → Arizona Cardinals + St. Louis Cardinals). Surface the ambiguity from context before committing to a resource.
candidates_present (top-level): the envelope carries a candidates section. Handle it via the candidates branch in Step 2 before anything else.
lookup_refresh_available (top-level): an entity in the query has no lookup row yet, but synced data could provide one. Run zillow-pp-cli sync to refresh entity lookups.
Top-level no_learnings_for_query_family: the table had no rows above the Jaccard floor. Pure cold start.
Step 4: teach & after finalizing your response - always
Teaching is unconditional. After resolving a query the store could not answer, background-teach the final resource mapping - no call-count threshold, no judging whether it was "worth" learning. The teach is the anchor of the loop: it triggers playbook synthesis for a family without a playbook, and same-referent phrasings fold into one family so near-duplicate teaches do not fragment the store. Fire it after assembling your user-facing response but BEFORE emitting it, with a shell & so the call returns immediately:
Silent on success. Errors only land in teach.log under the resolved state dir. Teach the most specific resource - if the user asked a broad question and you walked through parent records to find the specific answer, teach the leaf id, not the parent. The CLI uses seeded entity_lookups for cross-alias resolution at recall time, so a teach under one alias (e.g., "Niners") satisfies future queries under another alias (e.g., "49ers", "San Francisco") automatically.
PII rule: teach the structural question with identifiers stripped - never include names, emails, phone numbers, account ids, or other personal identifiers in taught queries or notes. The CLI scans teach queries for obvious email/phone shapes and warns, but does not block; strip before teaching rather than relying on the warning.
You do not need to decide whether a session "deserves" a playbook: a teach on a family without one auto-synthesizes a playbook_candidate from the session's journal, and the next session judges it via confirm/reject. Attach explicit playbook flags only when you already hold choreography worth recording verbatim - workarounds the CLI didn't surface (silently-dropped flags, undocumented params, pagination tricks, payload gotchas). Prefer the integrated one-call form - record the resource learning and the playbook in the same teach invocation:
# Common case: record both the resource learning AND the playbook in one call.
zillow-pp-cli teach \
--query "<user's question>" \
--resource <id> \
--playbook-file ~/playbooks/<shape>.json \
--playbook-notes-file ~/playbooks/<shape>-notes.md
# (append shell `&` to background it)# Alternate: playbook-only (no resource to record alongside).
zillow-pp-cli teach-playbook \
--query "<user's question>" \
--playbook-file ~/playbooks/<shape>.json \
--notes-file ~/playbooks/<shape>-notes.md
Playbook files are JSON with steps, entity_slots, expected_tool_calls. Notes files are markdown carrying the gotchas verbatim. File-free callers (MCP-only agents) pass the same content inline: --playbook-json and --playbook-notes on the integrated teach form, --playbook-json and --notes on teach-playbook. On the integrated teach form, the playbook flags are optional - omit them entirely for a resource-only teach. On the standalone teach-playbook form, at least one of the playbook and notes flags must be set; both empty is rejected. Playbooks are keyed on the structural query family (entities stripped) so a recipe taught from one entity-shaped query applies to every other query of the same shape, with slots_resolved binding the live query's canonical at recall time.
When you DO find a playbook on a future recall, treat it as ground truth: replay the steps with slots_resolved substitutions, skip the discovery that the choreography already documents, and read notes before any step.
Step 6: playbook amend & when your debug response identifies a correction
If your debug-protocol response identifies a concrete correction the notes or playbook should know — a workaround, an undocumented endpoint shape, a stale field name, observed schema drift, an empty-payload fallback — fire playbook amend BEFORE emitting your user-facing response. Same fire-and-forget posture as teach.
What counts as worth amending: a behavior you OBSERVED this session that future-you would benefit from knowing. Examples worth amending:
A workaround for a CLI surface that silently drops or misorders a flag.
An undocumented endpoint shape (response wrapped in {meta, results}, payload nested two levels deeper than the docs claim).
Observed schema drift (a field renamed, an index that shifted between seasons, a category label that the API now returns lower-cased).
What does NOT belong in notes:
The year-specific or entity-specific answer to the user's question. That's the response, not a learning.
Per-team / per-athlete / per-row data the playbook already retrieves at runtime.
Statements that paraphrase what the existing notes already say.
The amend command appends to the family's existing notes with a timestamped marker ([amend YYYY-MM-DDTHH:MMZ]: <text>). Multiple amends accumulate; the audit trail is visible. If no playbook exists yet for the family, amend creates a notes-only one (so cold-start corrections still land).
PII discipline for amend notes
playbook amend notes are designed to potentially flow upstream as shared knowledge in future versions of the Printing Press. Keep them clean of user-identifying content so the upstream-contribution path stays open without retroactive scrubbing:
Do NOT embed paths to user filesystems, personal API keys or tokens, user email addresses, user GitHub handles, or specific query histories tied to a single user.
Acceptable: endpoint shapes, undocumented field names, API gotchas, observed schema drift, workarounds for CLI surfaces, generalizable pagination or retry tactics.
If a correction is only meaningful with user-specific context, it belongs in a personal note, not in the playbook amend.
Measuring the loop
zillow-pp-cli learnings stats reports recall hit rate, teach-to-reuse, playbook resolution rate, and candidate confirm/reject counts from the local learn_events table. Rates are null until they have a denominator; everything stays on this machine. Use it to check whether the loop is earning its keep for this CLI.
Disabling learning
--no-learn on a single command short-circuits both recall and the teach write path. Use for deterministic agent flows or tests that must not be affected by accumulated learnings.
ZILLOW_NO_LEARN=true in the environment globally disables the pipeline.
Agent Feedback
When you (or the agent) notice something off about this CLI, record it:
zillow-pp-cli feedback "the --since flag is inclusive but docs say exclusive"
zillow-pp-cli feedback --stdin < notes.txt
zillow-pp-cli feedback list --json --limit 10
Entries are stored locally as feedback.jsonl under the resolved data dir. They are never POSTed unless ZILLOW_FEEDBACK_ENDPOINT is set AND either --send is passed or ZILLOW_FEEDBACK_AUTO_SEND=true. Default behavior is local-only.
Write what surprised you, not a bug report. Short, specific, one line: that is the part that compounds.
Output Delivery
Every command accepts --deliver <sink>. The output goes to the named sink in addition to (or instead of) stdout, so agents can route command results without hand-piping. Three sinks are supported:
Sink
Effect
stdout
Default; write to stdout only
file:<path>
Atomically write output to <path> (tmp + rename)
webhook:<url>
POST the output body to the URL (application/json or application/x-ndjson when --compact)
Unknown schemes are refused with a structured error naming the supported set. Webhook failures return non-zero and log the URL + HTTP status on stderr.
Named Profiles
A profile is a saved set of flag values, reused across invocations. Use it when a scheduled or recurring agent reuses the same saved flags while providing different input each run.
zillow-pp-cli profile save briefing --json
zillow-pp-cli --profile briefing research days-pending
zillow-pp-cli profile list --json
zillow-pp-cli profile show briefing
zillow-pp-cli profile delete briefing --yes
Explicit flags always win over profile values; profile values win over defaults. agent-context lists all available profiles under available_profiles so introspecting agents discover them at runtime.
Exit Codes
Code
Meaning
0
Success
2
Usage error (wrong arguments)
3
Resource not found
5
API error (upstream issue)
7
Rate limited (wait and retry)
10
Config error
Argument Parsing
Parse $ARGUMENTS:
Empty, help, or --help → show zillow-pp-cli --help output
Starts with install → ends with mcp → MCP installation; otherwise → see Prerequisites above
Anything else → Direct Use (execute as CLI command with --agent)
MCP Server Installation
Install the MCP server:
go install github.com/mvanhorn/printing-press-library/library/other/zillow/cmd/zillow-pp-mcp@latest
Register with Claude Code:
claude mcp add zillow-pp-mcp -- zillow-pp-mcp
Verify: claude mcp list
Direct Use
Check if installed: which zillow-pp-cli
If not found, offer to install (see Prerequisites at the top of this skill).
Match the user query to the best command from the Unique Capabilities and Command Reference above.
